I’m currently running an application in a production environment hosted on Azure (.net 8), which is set up with Azure B2C authentication. Recently, I’ve started to see a large number of failed requests with the following error message:

IDX20803: Unable to obtain configuration from: ‘System.String’. IDX20804: Unable to retrieve document from: ‘System.String’. The request was canceled due to the configured HttpClient.Timeout of 100 seconds elapsing. A task was canceled. A task was canceled.

This error seems to occur suddenly and without any apparent changes to the environment or the application. Interestingly, the application works fine after a restart.

I have checked and confirmed that there are no certificate failures. If this is a network issue, how can I diagnose it to be sure it’s really a network failure?

I couldn’t find any other errors that might be related to this issue. I’m looking for any insights into what might be causing this error and how to prevent it from happening in the future. Any help would be greatly appreciated.