visual studio 2022 will not launch gives a JSON_RPC connection erro

ken muir 0 Reputation points

I installed Visual Studio 2022 a week ago and it worked for 1 day. It then started to go give the following error when I launched it;

'could not start visual studio due to an error. streamJsonRpc.ConnectionLostException. The JSON_RPC connection with the remote party was lost before the reuqest could compelete.'

I removed all VPN's, virus protection software, old Visual Studios files etc. I have repaired/reinstalled Visual Studio svereal times but still get the same message. Any suggestions would be welcom

Visual Studio
Visual Studio
A family of Microsoft suites of integrated development tools for building applications for Windows, the web and mobile devices.
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Visual Studio Setup
Visual Studio Setup
Visual Studio: A family of Microsoft suites of integrated development tools for building applications for Windows, the web and mobile devices.Setup: The procedures involved in preparing a software program or application to operate within a computer or mobile device.
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  1. Anna Xiu-MSFT 25,551 Reputation points Microsoft Vendor

    Hi @ken muir

    Welcome to Microsoft Q&A! 

    Please go to %userappdata%\temp\servicehub\logs and check the generated logs.

    Like this:

    Error : Exception: System.IO.FileLoadException: Could not load file or assembly 'System.Numerics.Vectors, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)


    You can close all running VS instances and try editing your config files. 

    1. Go to C:\Program Files\Microsoft Visual Studio\2022\version\Common7\IDE and edit the devenv.exe.config file:
              <assemblyIdentity name="System.Numerics.Vectors" publicKeyToken="b03f5f7f11d50a3a" culture="neutral"/>
              <bindingRedirect oldVersion="" newVersion="" />
    1. Go to C:\Program Files\Microsoft Visual Studio\2022\version\Common7\ServiceHub\Services\Microsoft.Developer.IdentityService and edit Microsoft.Developer.IdentityService.dll.config file:
            <assemblyIdentity name="System.Numerics.Vectors" culture="neutral" publicKeyToken="b03f5f7f11d50a3a" />
            <bindingRedirect oldVersion="" newVersion="" />
    1. If it doesn’t work, please try to remove the older version of System.Memory.dll in the GAC via an elevated Developer Command Prompt for VS 2022:

    gacutil /u "System.Memory, Version="



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    1 person found this answer helpful.