From time to time VS2019 popup null reference exception at Microsoft.CodeAnalysis.Editor.Implementation.IntelliSense.AsyncCompletion.CompletionSource. Anything I can do about this?

Question

From time to time, I got a message from VS2019 about a null reference exception.
In the log, I found this:

1011
2021/02/13 10:34:25.506
Error
Editor or Editor Extension
System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.CodeAnalysis.Editor.Implementation.IntelliSense.AsyncCompletion.CompletionSource.d__27.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.Text.Utilities.GuardedOperations.d__36`1.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Microsoft.VisualStudio.Telemetry.WindowsErrorReporting.WatsonReport.GetClrWatsonExceptionInfo(Exception exceptionObject)

What should I do about this?

Thanks.
Eric Garnier

Answer

Hi @Eric Garnier ,

Welcome to Microsoft Q&A!

Which version of Visual Studio 2019 are you using? Could you tell me how you encountered this situation? What’s your project type?

Please update your Visual Studio to the latest version. Then, open CMD and go to C:\Program Files (x86)\Microsoft Visual Studio\2019\version name\Common7\IDE folder, run the command: devenv /safemode to run your Visual Studio in safe mode and check if the exception disappears.

Meanwhile, you can also try to repair your Visual Studio by running VS Installer > More > Repair.

Sincerely,
Anna

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Answer

I try to be up to date for VS Version.

My projects are C# project (console and library).

It seem to occur randomly. So I don't have a scenario. Should I find one, I will let known.

Thanks for your answer @Anna Xiu-MSFT

I will try the safe mode and let you known.

Eric

Microsoft Visual Studio Community 2019
Version 16.8.5
VisualStudio.16.Release/16.8.5+31005.135
Microsoft .NET Framework
Version 4.8.04084

Installed Version: Community

Visual C++ 2019 00435-60000-00000-AA191
Microsoft Visual C++ 2019

ASP.NET and Web Tools 2019 16.8.559.8768
ASP.NET and Web Tools 2019

ASP.NET Core Razor Language Services 16.1.0.2052803+84e121f1403378489b842e1797df2f3f5a49ac3c
Provides languages services for ASP.NET Core Razor.

ASP.NET Web Frameworks and Tools 2019 16.8.559.8768
For additional information, visit https://www.asp.net/

Azure App Service Tools v3.0.0 16.8.559.8768
Azure App Service Tools v3.0.0

Azure Functions and Web Jobs Tools 16.8.559.8768
Azure Functions and Web Jobs Tools

C# Tools 3.8.0-5.20604.10+9ed4b774d20940880de8df1ca8b07508aa01c8cd
C# components used in the IDE. Depending on your project type and settings, a different version of the compiler may be used.

Common Azure Tools 1.10
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.

Customize Visual Studio Window Title 4.0
This lightweight extension allows changing the window title of Visual Studio to include a folder tree with a configurable min depth and max depth distance from the solution/project file, and the use of special tags to help with many other possible scenarios (Git, Hg, TFS, SVN...).
Solution-specific overriding rules are available as well to cover virtually any possible renaming needs. It can also be configured so that the rules apply only when at least two instances of Visual Studio are running with the same window title.
This is particularly useful when branching a solution/project: it becomes possible to easily identify which branch you are working on, in case both would have the same solution/project name.

Fabric.DiagnosticEvents 1.0
Fabric Diagnostic Events

ILSpy.AddIn 1.0
Integration of the ILSpy Decompiler into Visual Studio.

IntelliCode Extension 1.0
IntelliCode Visual Studio Extension Detailed Info

Microsoft Azure Service Fabric Tools for Visual Studio 2.5
Microsoft Azure Service Fabric Tools for Visual Studio

Microsoft Azure Tools 2.9
Microsoft Azure Tools for Microsoft Visual Studio 2019 - v2.9.30924.1

Microsoft Continuous Delivery Tools for Visual Studio 0.4
Simplifying the configuration of Azure DevOps pipelines from within the Visual Studio IDE.

Microsoft JVM Debugger 1.0
Provides support for connecting the Visual Studio debugger to JDWP compatible Java Virtual Machines

Microsoft Library Manager 2.1.113+g422d40002e.RR
Install client-side libraries easily to any web project

Microsoft MI-Based Debugger 1.0
Provides support for connecting Visual Studio to MI compatible debuggers

Microsoft Visual C++ Wizards 1.0
Microsoft Visual C++ Wizards

Microsoft Visual Studio Tools for Containers 1.1
Develop, run, validate your ASP.NET Core applications in the target environment. F5 your application directly into a container with debugging, or CTRL + F5 to edit & refresh your app without having to rebuild the container.

Microsoft Visual Studio VC Package 1.0
Microsoft Visual Studio VC Package

Node.js Tools 1.5.20902.1 Commit Hash:b474efcb6f92db52a8f8e2e6a8cb9648476885cc
Adds support for developing and debugging Node.js apps in Visual Studio

NuGet Package Manager 5.8.1
NuGet Package Manager in Visual Studio. For more information about NuGet, visit https://docs.nuget.org/

Office Developer Tools for Visual Studio 16.0.30502.00
Microsoft Office Developer Tools for Visual Studio

ProjectServicesPackage Extension 1.0
ProjectServicesPackage Visual Studio Extension Detailed Info

SQL Server Data Tools 16.0.62102.01130
Microsoft SQL Server Data Tools

TermWindow Extension 1.0
TermWindow Visual Studio Extension Detailed Info

Test Adapter for Boost.Test 1.0
Enables Visual Studio's testing tools with unit tests written for Boost.Test. The use terms and Third Party Notices are available in the extension installation directory.

Test Adapter for Google Test 1.0
Enables Visual Studio's testing tools with unit tests written for Google Test. The use terms and Third Party Notices are available in the extension installation directory.

TypeScript Tools 16.0.21016.2001
TypeScript Tools for Microsoft Visual Studio

Visual Basic Tools 3.8.0-5.20604.10+9ed4b774d20940880de8df1ca8b07508aa01c8cd
Visual Basic components used in the IDE. Depending on your project type and settings, a different version of the compiler may be used.

Visual C++ for Cross Platform Mobile Development (Android) 16.0.30608.117
Visual C++ for Cross Platform Mobile Development (Android)

Visual C++ for Linux Development 1.0.9.30608
Visual C++ for Linux Development

Visual F# Tools 16.8.0-beta.20507.4+da6be68280c89131cdba2045525b80890401defd
Microsoft Visual F# Tools

Visual Studio Code Debug Adapter Host Package 1.0
Interop layer for hosting Visual Studio Code debug adapters in Visual Studio

Visual Studio Container Tools Extensions 1.0
View, manage, and diagnose containers within Visual Studio.

Visual Studio Tools for CMake 1.0
Visual Studio Tools for CMake

Visual Studio Tools for Containers 1.0
Visual Studio Tools for Containers

Workflow Manager Tools 1.0 1.0
This package contains the necessary Visual Studio integration components for Workflow Manager.

===============================================================================

Answer

Hi @Anna Xiu-MSFT ,
It just occurs will I was editing a C# source file in my library.
I got the activity log (I replace some path with [***]).

Maybe it can help.

Eric

1
2021/02/17 14:35:19.987
Information
VisualStudio
Microsoft Visual Studio 2019 version: 16.0.31004.167

2
2021/02/17 14:35:19.987
Information
VisualStudio
Log ID
{27C40C56-1708-4A14-8CA5-AA99A63CC93A}

3
2021/02/17 14:35:19.988
Information
VisualStudio
Running in isolation mode.

4
2021/02/17 14:35:20.003
Information
VisualStudio
Looking for master PkgDef file
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\master.pkgdef

5
2021/02/17 14:35:20.008
Information
VisualStudio
Creating PkgDefCacheNonVolatile

6
2021/02/17 14:35:20.008
Information
VisualStudio
PkgDefCache flags

00013801

7
2021/02/17 14:35:20.013
Information
VisualStudio
Double-checking master pkgdef file

8
2021/02/17 14:35:20.015
Information
VisualStudio
PkgDefManagement initialized

9
2021/02/17 14:35:20.015
Information
VisualStudio
RootFolder
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community

10
2021/02/17 14:35:20.015
Information
VisualStudio
ShellFolder
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community

680
2021/02/17 14:35:35.043
Error
Extension Manager
Extension will not be loaded because an extension with the same ID 'Microsoft.Windows.DevelopmentKit.Desktop' is already loaded at C:\PROGRAM FILES (X86)\COMMON FILES\MICROSOFT\EXTENSIONMANAGER\EXTENSIONS\MICROSOFT\WINDOWS KITS\10\DESKTOP SDK...
C:\PROGRAM FILES (X86)\COMMON FILES\MICROSOFT\EXTENSIONMANAGER\EXTENSIONS\MICROSOFT\WINDOWS KITS\8.0\DESKTOP SDK

681
2021/02/17 14:35:35.045
Error
Extension Manager
Extension will not be loaded because an extension with the same ID 'Microsoft.Windows.DevelopmentKit.Desktop' is already loaded at C:\PROGRAM FILES (X86)\COMMON FILES\MICROSOFT\EXTENSIONMANAGER\EXTENSIONS\MICROSOFT\WINDOWS KITS\10\DESKTOP SDK...
C:\PROGRAM FILES (X86)\COMMON FILES\MICROSOFT\EXTENSIONMANAGER\EXTENSIONS\MICROSOFT\WINDOWS KITS\8.1\DESKTOP SDK

682
2021/02/17 14:35:35.046
Error
Extension Manager
Extension will not be loaded because an extension with the same ID 'Microsoft.Windows.DevelopmentKit.WindowsStore' is already loaded at C:\PROGRAM FILES (X86)\COMMON FILES\MICROSOFT\EXTENSIONMANAGER\EXTENSIONS\MICROSOFT\WINDOWS KITS\10\WINDOWS STORE SDK...
C:\PROGRAM FILES (X86)\COMMON FILES\MICROSOFT\EXTENSIONMANAGER\EXTENSIONS\MICROSOFT\WINDOWS KITS\8.1\WINDOWS STORE SDK

944
2021/02/17 14:37:05.018
Information
VisualStudio
Begin package load [Microsoft.VisualStudio.Services.Promotions.PromotionsPackage]
{B596A79C-0044-4FC4-AAF6-A700B6FDC9ED}

945
2021/02/17 14:37:05.019
Information
VisualStudio
Begin package load [Microsoft.VisualStudio.PlatformUI.OutputChannelPackage]
{E81208FB-9663-4335-B42A-218AE1064AD1}

946
2021/02/17 14:37:05.032
Information
VisualStudio
End package load [Microsoft.VisualStudio.PlatformUI.OutputChannelPackage]
{E81208FB-9663-4335-B42A-218AE1064AD1}

947
2021/02/17 14:37:05.174
Information
VisualStudio
End package load [Microsoft.VisualStudio.Services.Promotions.PromotionsPackage]
{B596A79C-0044-4FC4-AAF6-A700B6FDC9ED}

948
2021/02/17 14:37:05.183
Information
VisualStudio
Begin package load [Code Analysis Package]
{B20604B0-72BC-4953-BB92-95BF26D30CFA}

949
2021/02/17 14:37:05.354
Information
PromotionsFramework
Received promotion with RuleId: 22D8D1DD-FC08-401B-8694-0BD24FC2CBA7

950
2021/02/17 14:37:05.357
Information
PromotionsFramework
Subscribed to trigger event for promotion with RuleId: 22D8D1DD-FC08-401B-8694-0BD24FC2CBA7

951
2021/02/17 14:37:05.357
Information
PromotionsFramework
Received promotion with RuleId: 496FC250-1F2D-4335-B359-647330762614

952
2021/02/17 14:37:05.357
Information
PromotionsFramework
Subscribed to trigger event for promotion with RuleId: 496FC250-1F2D-4335-B359-647330762614

953
2021/02/17 14:37:05.357
Information
PromotionsFramework
Received promotion with RuleId: A10E8B1A-B7A6-45B1-B263-0AA92A0B5459

954
2021/02/17 14:37:05.357
Information
PromotionsFramework
Subscribed to trigger event for promotion with RuleId: A10E8B1A-B7A6-45B1-B263-0AA92A0B5459

955
2021/02/17 14:37:05.358
Information
PromotionsFramework
Received promotion with RuleId: B8E52CE5-2E39-4015-926F-EC0C89D1050A

956
2021/02/17 14:37:05.358
Information
PromotionsFramework
Subscribed to trigger event for promotion with RuleId: B8E52CE5-2E39-4015-926F-EC0C89D1050A

957
2021/02/17 14:37:05.358
Information
PromotionsFramework
Received promotion with RuleId: CED1FFBC-6E63-450F-9A99-CDE4C56F401D

958
2021/02/17 14:37:05.358
Information
PromotionsFramework
Subscribed to trigger event for promotion with RuleId: CED1FFBC-6E63-450F-9A99-CDE4C56F401D

959
2021/02/17 14:37:05.358
Information
PromotionsFramework
Received promotion with RuleId: D5EF9893-2215-44EF-8D6E-D563C6FFB1AC

960
2021/02/17 14:37:05.358
Information
PromotionsFramework
Subscribed to trigger event for promotion with RuleId: D5EF9893-2215-44EF-8D6E-D563C6FFB1AC

961
2021/02/17 14:37:05.359
Information
PromotionsFramework
Received promotion with RuleId: FA900934-7FD0-4DED-A500-47CC9B2E7327

962
2021/02/17 14:37:05.359
Information
PromotionsFramework
Subscribed to trigger event for promotion with RuleId: FA900934-7FD0-4DED-A500-47CC9B2E7327

963
2021/02/17 14:37:05.359
Information
PromotionsFramework
Received promotion with RuleId: 7BED179A-3BE7-414D-8C40-914B591EF553

964
2021/02/17 14:37:05.359
Information
PromotionsFramework
Subscribed to trigger event for promotion with RuleId: 7BED179A-3BE7-414D-8C40-914B591EF553

965
2021/02/17 14:37:05.359
Information
PromotionsFramework
Received promotion with RuleId: 93EA625A-53B4-4003-B56F-AB936759983B

966
2021/02/17 14:37:05.359
Information
PromotionsFramework
Subscribed to trigger event for promotion with RuleId: 93EA625A-53B4-4003-B56F-AB936759983B

967
2021/02/17 14:37:05.360
Information
PromotionsFramework
Received promotion with RuleId: DED7D4AD-2C83-4B10-BC64-5C8DF0C052A5

968
2021/02/17 14:37:05.360
Information
PromotionsFramework
Subscribed to trigger event for promotion with RuleId: DED7D4AD-2C83-4B10-BC64-5C8DF0C052A5

969
2021/02/17 14:37:05.407
Information
VisualStudio
End package load [Code Analysis Package]
{B20604B0-72BC-4953-BB92-95BF26D30CFA}

970
2021/02/17 14:37:05.416
Information
VisualStudio
Begin package load [ContactServiceModelPackage]
{BB47EB74-8188-4108-96F3-29019920D12F}

971
2021/02/17 14:37:05.705
Information
UserConnection
eric_garnier@Karima ben .com signed in for IDE user

972
2021/02/17 14:37:05.705
Information
UserConnection
VS user ID = 1b6fdcd2-2ea9-4220-b618-7078c23cefc8

973
2021/02/17 14:37:05.710
Information
VisualStudio
End package load [ContactServiceModelPackage]
{BB47EB74-8188-4108-96F3-29019920D12F}

974
2021/02/17 14:37:05.724
Information
VisualStudio
Begin package load [Ping Service Proffer Package]
{84E5EFE7-2E0D-4434-96C1-E281C9573FDC}

975
2021/02/17 14:37:05.739
Information
VisualStudio
End package load [Ping Service Proffer Package]
{84E5EFE7-2E0D-4434-96C1-E281C9573FDC}

976
2021/02/17 14:37:05.744
Information
VisualStudio
Begin package load [Roaming Manager Package]
{54888390-2C04-4B04-B451-3166730C75BA}

977
2021/02/17 14:37:05.759
Information
VisualStudio
End package load [Roaming Manager Package]
{54888390-2C04-4B04-B451-3166730C75BA}

978
2021/02/17 14:37:05.865
Warning
GlobalBrokeredServiceContainer
Request for "Microsoft.VisualStudio.Shell.Internal.SettingsManager (1.0)" from Process denied because the service is only exposed RemoteExclusiveClient, LiveShareGuest.

979
2021/02/17 14:37:05.865
Warning
GlobalBrokeredServiceContainer
Request for proxy to "Microsoft.VisualStudio.Shell.Internal.SettingsManager (1.0)" is declined: ServiceAudienceMismatch.

980
2021/02/17 14:37:05.912
Information
RoamingManagerPackage
User logged in : 1b6fdcd2-2ea9-4220-b618-7078c23cefc8.14_PreferredProfile

981
2021/02/17 14:37:05.995
Information
VisualStudio
Begin package load [Roaming Profiles Package]
{C194969A-A5B1-4AF2-A9DF-ECF7CE982A05}

982
2021/02/17 14:37:06.018
Information
VisualStudio
End package load [Roaming Profiles Package]
{C194969A-A5B1-4AF2-A9DF-ECF7CE982A05}

983
2021/02/17 14:37:12.089
Information
RoslynNuGetSearch
Creating database from bytes completed

984
2021/02/17 14:37:12.094
Information
RoslynNuGetSearch
Downloading and processing patch file: Elfie_V1/20201029_Patch.xml

985
2021/02/17 14:37:12.105
Information
RoslynNuGetSearch
Creating download client: Elfie_V1/20201029_Patch.xml

986
2021/02/17 14:37:12.108
Information
RoslynNuGetSearch
Creating download client completed

987
2021/02/17 14:37:12.111
Information
RoslynNuGetSearch
Read file from client

988
2021/02/17 14:37:12.114
Information
RoslynNuGetSearch
Read file completed. Client returned no data

989
2021/02/17 14:37:12.116
Information
RoslynNuGetSearch
File not downloaded. Trying again in 00:01:00

990
2021/02/17 14:38:12.129
Information
RoslynNuGetSearch
Read file from client

991
2021/02/17 14:38:12.131
Information
RoslynNuGetSearch
Read file completed. Client returned data

992
2021/02/17 14:38:12.132
Information
RoslynNuGetSearch
Converting data to XElement

993
2021/02/17 14:38:12.133
Information
RoslynNuGetSearch
Converting data to XElement completed

994
2021/02/17 14:38:12.135
Information
RoslynNuGetSearch
Processing patch element

995
2021/02/17 14:38:12.137
Information
RoslynNuGetSearch
Local version is up to date

996
2021/02/17 14:38:12.142
Information
RoslynNuGetSearch
Processing patch element completed. Update again in 1.00:00:00

997
2021/02/17 14:38:12.145
Information
RoslynNuGetSearch
Downloading and processing patch file completed

998
2021/02/17 14:38:12.146
Information
RoslynNuGetSearch
Patching local database completed

999
2021/02/17 14:38:12.147
Information
RoslynNuGetSearch
Waiting 1.00:00:00 until next update

1000
2021/02/17 14:50:25.197
Information
MruList
Entering OnAddVerbInvoked

1001
2021/02/17 14:50:25.197
Information
MruList
Entering AddItem. Persistence data for item: C:\Users[]\OrderType1Context.cs

1002
2021/02/17 14:50:25.198
Information
MruList
Entering TryPromoteItem

1003
2021/02/17 14:50:25.198
Information
MruList
Did not find item to promote

1004
2021/02/17 14:50:25.202
Information
CodeContainerTracing
Entering MruItemsStoreServiceDecorator.AddMRUItem. Item category: 01235aad-8f1b-429f-9d02-61a0101ea275, lpszItem: %UserProfile%[]\OrderType1Context.cs|{00000000-0000-0000-0000-000000000000}||False

1005
2021/02/17 14:55:25.188
Information
MruList
Entering OnAddVerbInvoked

1006
2021/02/17 14:55:25.188
Information
MruList
Entering AddItem. Persistence data for item: C:\Users[]\OrderType1Context.cs

1007
2021/02/17 14:55:25.188
Information
MruList
Entering TryPromoteItem

1008
2021/02/17 14:55:25.188
Information
MruList
Entering PromoteItemAt and found the index of the item to be 0

1009
2021/02/17 15:00:25.200
Information
MruList
Entering OnAddVerbInvoked

1010
2021/02/17 15:00:25.200
Information
MruList
Entering AddItem. Persistence data for item: C:\Users[]\OrderType1Context.cs

1011
2021/02/17 15:00:25.200
Information
MruList
Entering TryPromoteItem

1012
2021/02/17 15:00:25.200
Information
MruList
Entering PromoteItemAt and found the index of the item to be 0

1013
2021/02/17 15:05:25.192
Information
MruList
Entering OnAddVerbInvoked

1014
2021/02/17 15:05:25.192
Information
MruList
Entering AddItem. Persistence data for item: C:\Users[]\OrderType1Context.cs

1015
2021/02/17 15:05:25.192
Information
MruList
Entering TryPromoteItem

1016
2021/02/17 15:05:25.192
Information
MruList
Entering PromoteItemAt and found the index of the item to be 0

1017
2021/02/17 15:06:38.095
Information
MruList
Entering OnAddVerbInvoked

1018
2021/02/17 15:06:38.095
Information
MruList
Entering AddItem. Persistence data for item: C:\Users[]\OrderType1Context.cs

1019
2021/02/17 15:06:38.095
Information
MruList
Entering TryPromoteItem

1020
2021/02/17 15:06:38.095
Information
MruList
Entering PromoteItemAt and found the index of the item to be 0

1021
2021/02/17 15:07:05.319
Information
MruList
Entering OnAddVerbInvoked

1022
2021/02/17 15:07:05.319
Information
MruList
Entering AddItem. Persistence data for item: C:\Users[]\OrderType1Context.cs

1023
2021/02/17 15:07:05.319
Information
MruList
Entering TryPromoteItem

1024
2021/02/17 15:07:05.319
Information
MruList
Entering PromoteItemAt and found the index of the item to be 0

1025
2021/02/17 16:50:53.154
Error
Cascade Workspace
[ContactServiceModel E] Request for method:publishPresence failed with error:Microsoft.Cascade.Rpc.RemoteInvocationException: Server timeout (30000.00ms) elapsed without receiving a message from the server. at Microsoft.Cascade.Rpc.RpcProxy.d__18.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.Cascade.Rpc.RpcProxy.d__161.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.LiveShare.ContactServiceModel.ContactServiceProviderModel.<RequestAsync>d__592.MoveNext() serviceId:LivesharePresence. Retries remaining: 2

1026
2021/02/17 16:50:53.586
Error
Cascade Workspace
[ContactServiceModel E] Request for method:publishPresence failed with error:Microsoft.Cascade.Rpc.RemoteInvocationException: Invalid state for request type:publishPresence at Microsoft.Cascade.Rpc.RpcProxy.d__18.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.Cascade.Rpc.RpcProxy.d__161.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.LiveShare.ContactServiceModel.ContactServiceProviderModel.<RequestAsync>d__592.MoveNext() serviceId:LivesharePresence. Retries remaining: 1

1027
2021/02/17 16:50:54.013
Error
Cascade Workspace
[ContactServiceModel E] Request for method:publishPresence failed with error:Microsoft.Cascade.Rpc.RemoteInvocationException: Invalid state for request type:publishPresence at Microsoft.Cascade.Rpc.RpcProxy.d__18.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.Cascade.Rpc.RpcProxy.d__161.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.LiveShare.ContactServiceModel.ContactServiceProviderModel.<RequestAsync>d__592.MoveNext() serviceId:LivesharePresence. Retries remaining: 0

1028
2021/02/17 17:10:39.556
Information
MruList
Entering OnAddVerbInvoked

1029
2021/02/17 17:10:39.556
Information
MruList
Entering AddItem. Persistence data for item: C:\Users[]\OrderType1Context.cs

1030
2021/02/17 17:10:39.556
Information
MruList
Entering TryPromoteItem

1031
2021/02/17 17:10:39.556
Information
MruList
Entering PromoteItemAt and found the index of the item to be 0

1032
2021/02/17 17:15:39.593
Information
MruList
Entering OnAddVerbInvoked

1033
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Entering AddItem. Persistence data for item: C:\Users[***]\OrderType1Context.cs

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Entering TryPromoteItem

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Entering PromoteItemAt and found the index of th

Answer

Hi @Anna Xiu-MSFT
sorry to be late. I am not full time using VS2019.
I just try to run VS in safemode, but got not to much success.
the solution explorer fills with this:

Failed to create view with exception:
System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.VisualStudio.ProjectSystem.Managed.VS, Version=16.8.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
File name: 'Microsoft.VisualStudio.ProjectSystem.Managed.VS, Version=16.8.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' ---> System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.VisualStudio.ProjectSystem.Managed.VS, Version=16.7.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
File name: 'Microsoft.VisualStudio.ProjectSystem.Managed.VS, Version=16.7.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'

WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].

at System.ModuleHandle.ResolveMethod(RuntimeModule module, Int32 methodToken, IntPtr* typeInstArgs, Int32 typeInstCount, IntPtr* methodInstArgs, Int32 methodInstCount)
at System.ModuleHandle.ResolveMethodHandleInternalCore(RuntimeModule module, Int32 methodToken, IntPtr[] typeInstantiationContext, Int32 typeInstCount, IntPtr[] methodInstantiationContext, Int32 methodInstCount)
at System.ModuleHandle.ResolveMethodHandleInternal(RuntimeModule module, Int32 methodToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext)
at System.Reflection.RuntimeModule.ResolveMethod(Int32 metadataToken, Type[] genericTypeArguments, Type[] genericMethodArguments)
at Microsoft.VisualStudio.Composition.Reflection.ResolverExtensions.Resolve(MethodRef methodRef)
at Microsoft.VisualStudio.Composition.Reflection.MethodRef.Resolve()
at Microsoft.VisualStudio.Composition.RuntimeExportProviderFactory.RuntimeExportProvider.RuntimePartLifecycleTracker.CreateValue()
at Microsoft.VisualStudio.Composition.ExportProvider.PartLifecycleTracker.Create()
at Microsoft.VisualStudio.Composition.ExportProvider.PartLifecycleTracker.MoveNext(PartLifecycleState nextState)
at Microsoft.VisualStudio.Composition.ExportProvider.PartLifecycleTracker.MoveToState(PartLifecycleState requiredState)
at Microsoft.VisualStudio.Composition.ExportProvider.PartLifecycleTracker.GetValueReadyToExpose()
at Microsoft.VisualStudio.Composition.RuntimeExportProviderFactory.RuntimeExportProvider.<>c__DisplayClass15_0.b__0()
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.VisualStudio.Composition.RuntimeExportProviderFactory.RuntimeExportProvider.<>c__DisplayClass15_0.b__0()
at Microsoft.VisualStudio.Composition.DelegateServices.<>c__DisplayClass2_01.b__0() at System.Lazy1.CreateValue()
at System.Lazy1.LazyInitValue() at System.Lazy1.get_Value()
at Microsoft.VisualStudio.PlatformUI.AttachedCollectionService.<>c__DisplayClass29_0.b__0(Lazy2 provider) at System.Linq.Enumerable.WhereSelectListIterator2.MoveNext()
at System.Linq.Enumerable.WhereEnumerableIterator1.MoveNext() at System.Collections.Generic.List1..ctor(IEnumerable`1 collection)
at Microsoft.VisualStudio.PlatformUI.AttachedCollectionService.AggregateItemsSource(Object item, String relationshipName)
at Microsoft.VisualStudio.PlatformUI.AttachedCollectionService.GetOrCreateCollectionSource(Object item, String relationshipName)
at Microsoft.VisualStudio.PlatformUI.SolutionNavigatorPane.HookShowSolutionNodeEvents(IVsHierarchyItem solution)
at Microsoft.VisualStudio.PlatformUI.SolutionNavigatorPane.RefillNavigator(Boolean skipRestorePhase, Boolean isFirstLoad)

The main window fills with this :
![72589-image.png][1]

I close and restart VS, but got the same result when opening my solution.
I will try to repair it with VS Installer.

I will let you known the result.

Eric
[1]: /api/attachments/72589-image.png?platform=QnA

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