Microsoft.IdentityModel.SecurityTokenService.RequestFailedException: Token request failed

Question

I have the following CSOM code:-

using (ClientContext context = new PnP.Framework.AuthenticationManager().GetACSAppOnlyContext(RisksiteUrl, clientId, clientSecret, AzureEnvironment.Production))

it was working well for around 1 year, but starting from yesterday the above code will raise this exception:-

Unhandled Exception: Microsoft.IdentityModel.SecurityTokenService.RequestFailedException: Token request failed. ---> System.Net.WebException: The remote server
returned an error: (401) Unauthorized.

Any advice?
Thanks

Answer 1

Hi @Quanta Dialysis Technologies Limited ,

Maybe the client secret expired, so you got this error. By default, client secrets for SharePoint Add-ins that are registered by using the AppRegNew.aspx page expire after one year.

You could renew the client secret: https://medium.com/@cecildt/renewing-sharepoint-online-provider-add-ins-client-secret-ba2828a49e7

Or register a new app to make it work.

Update:

This could be related with the TLS 1.2 enforcement that's being rolled out. Read this article for tetails: https://techcommunity.microsoft.com/t5/microsoft-sharepoint-blog/provider-hosted-app-pha-application-errors-tls-errors-and-401/ba-p/2273611

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Answer 2

It is necessary to look at the exception message, because in my case I had a solution that had two projects and after installing the pnp framework the solution was with newtonsoft.json v12 and in the other project it was with newtonsoft.json v10, I discovered this by the message from exception - "Could not load file or assembly 'Newtonsoft.Json, Version=12.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of the important dependencies. The assembly manifest definition does not match the reference to the assembly. ( Exception from HRESULT: 0x80131040)":"Newtonsoft.Json, Version=12.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed", after discovering this I updated them both to have v12 and it worked.

Answer 3

I'm getting this issue in Debug Mode in VS 2022 and I don't understand it. Works fine with same code on Azure App Service. Anyone out there getting same issue? Only started recently and I did upgrade to Windows 11 a few months ago and haven't run code for a while. Powershell 7 I can connect to SharePoint App Reg. Not expired either. Intermittent access. It must be related to Project or Visual Studio 2022