After installing Windows 11 update 2023-KB5031323, the applications I developed with Visual Studio 2013 Ultimate (Lightswitch, Visual Basic) fail to load. Two cases arise: the screen displays 'Loading' but nothing further happens there is an error message window (see attached) When I start the applications as an Aministrator they do not load on the first attempt, but they do at the second ... Any ideas? Thanks.

Hello I had the exact same issue The solution is a simple change to the apps web.config files that I found at this URL https://developercommunity.visualstudio.com/t/SLLauncher-lightswitch-desktop-applicati/10490392?sort=active&topics=uservoice+supporters+0 <appSettings> ... <add key="aspnet:FileNameUtilUseLegacyInvalidChars" value="true" /> </appSettings> Unfortunately you will likely have the app locally installed within %localappdata%\Apps somewhere. We just searched for web.config within that directory and deleted the locally installed folders then re-installed. Could of course also edit each users local web.config file.

Hi @AB20232015, Welcome to Microsoft Q&A! You can close all running VS instances and try to delete the hidden .vs, bin and obj folders in the project folder. Besides, the VS2013 is too old. I would like to recommend you migrate your project to a newer version of VS, such as VS2022. You can refer to: Project migration and upgrade reference for Visual Studio to do a migration. By the way, currently in Microsoft Q&A we only support English, please edit the error message into English so that we can investigate it further. Thanks for your understanding. Sincerely, Anna If the answer is the right solution, please click " Accept Answer " and kindly upvote it. If you have extra questions about this answer, please click "Comment". Note: Please follow the steps in our <a href="https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fanswers%2Farticles%2F67444%2Femail-notifications.html&data=05%7C01%7Cv-anxiu%40microsoft.com%7Cfbafa63a6d244bc7b02308dab02dffeb%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C638016009146709048%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=fQwgaRxLofINtfGCjYbP6ygI0lVyksSFgHo7VnshDEY%3D&reserved=0" rel="ugc nofollow">documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Problem with Visual Studio 2013 apps after installing Windows 11 update 2023-KB5031323

AB20232015 20

After installing Windows 11 update 2023-KB5031323, the applications I developed with Visual Studio 2013 Ultimate (Lightswitch, Visual Basic) fail to load.

Two cases arise:

the screen displays 'Loading' but nothing further happens
there is an error message window (see attached)

When I start the applications as an Aministrator they do not load on the first attempt, but they do at the second ...

Any ideas? Thanks.

Afbeelding1

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Accepted answer

Irvine, Ian 80 Reputation points

2023-10-26T15:35:09.9466667+00:00
Hello

I had the exact same issue

The solution is a simple change to the apps web.config files that I found at this URL

https://developercommunity.visualstudio.com/t/SLLauncher-lightswitch-desktop-applicati/10490392?sort=active&topics=uservoice+supporters+0

<appSettings> ... <add key="aspnet:FileNameUtilUseLegacyInvalidChars" value="true" /> </appSettings>

Unfortunately you will likely have the app locally installed within %localappdata%\Apps somewhere. We just searched for web.config within that directory and deleted the locally installed folders then re-installed. Could of course also edit each users local web.config file.
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AB20232015 20 Reputation points

2023-10-29T08:18:56.2833333+00:00

Hi Ian

Thanks. It works indeed. I changed the web.config file via the Visual Studio IDE and created a fix for the desktop program.

Regards

Alan
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1 additional answer

Anna Xiu-MSFT 30,116 Reputation points Microsoft Vendor

2023-10-16T09:03:05.15+00:00

Hi @AB20232015,

Welcome to Microsoft Q&A!

You can close all running VS instances and try to delete the hidden .vs, bin and obj folders in the project folder.

Besides, the VS2013 is too old. I would like to recommend you migrate your project to a newer version of VS, such as VS2022. You can refer to: Project migration and upgrade reference for Visual Studio to do a migration.

By the way, currently in Microsoft Q&A we only support English, please edit the error message into English so that we can investigate it further. Thanks for your understanding.

Sincerely,

Anna

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
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AB20232015 20 Reputation points

2023-10-16T09:44:41.8533333+00:00

Hi Anna
Thanks for the quick response.

I closed all VS instances and deleted all bin and obj folders in the project folder, also in the .DesktopClient and .Server subfolders. I do not see the .vs folder although the 'view hidden files' is turned on. Then I opened the project and tried to run it with Start, but it gives the same error message.

Here is a translation of the Dutch parts of the error message:
<title>Cannot find a portion of the path C:\services\microsoft-lightswitch-security-servergenerated-implementation-authenticationservice.svc.compiled.</title>
...
Source character sets for error detection are not available. Often the key and arguments do not provide enough information to diagnose the problem. See http...

I understand that VS2013 is outdated, but I cannot migrate to VS2022 because the applications are built with Lightswitch / Silverlight and both of them are are not supported inVS2022.

Kind regards

Alan

Anna Xiu-MSFT 30,116 Reputation points Microsoft Vendor

2023-10-17T09:40:54.0933333+00:00

Hello, from the error message, could you check that the following path exists properly?

C:\services\microsoft-lightswitch-security-servergenerated-implementation-authenticationservice.svc.compiled

Have you tried to restart your pc?

AB20232015 20 Reputation points

2023-10-17T12:11:04.47+00:00

Hi Anna

Thanks for taking the time to respond.

The pc has been rebooted multiple times. This does not change anything.

The path "C:\services\microsoft-lightswitch..." does not exist, nor has it existed ever before. Some of these error messages are not to be misleading.

These desktop apps are very stable and used for eight years. There are a couple of hundred users and they all experience the same issue. It clearly has to do with this particular Windows Update, because that is the only element that changed. As mentioned in my original question, I have found a workaround, so for now it is workable. You should therefore not waste your time on this.

It is an concern though that these updates can make applications inoperable.

I cannot rewrite everything each time there are new products.

It is not clear in my mind how this can be escalated to the team that actually produced the update; they should have a pretty clear idea. I came across "Q&A", but that is perhaps not the right forum.

Can you point me in the right direction?

Thanks for your support.

Regards

Alan

Anna Xiu-MSFT 30,116 Reputation points Microsoft Vendor

2023-10-19T10:22:19.1733333+00:00

Hello, you can report Windows Update issue in Windows Community.

AB20232015 20 Reputation points

2023-10-19T11:23:57.7566667+00:00

Done. Thanks Anna

Regards
Alan

Tea-NT 0 Reputation points

2023-11-02T09:11:59.56+00:00

This issue has nothing to do with the Visual Studio Version. <add key="aspnet:FileNameUtilUseLegacyInvalidChars" value="true" /> it work
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