TF400898: An Internal Error Occurred.

Issue : TF400898: An Internal Error Occurred. Activity Id: XXXX-XXX-XXX-XXXXXX

Solution : This error mostly occurs when you are trying to access information from Azure DevOps via some REST API calls.And according to Microsoft this is mostly a timeout issue from Azure DevOps. And if you try it again after sometime this error seems to goes away.

Sometimes This error specifically occurs when you are trying to get large amount of data using API queries.If you ever get this error, then follow the above steps. You might see this error with login/Build/Repos etc., This is a error/issue from Azure DevOps so if you get this again and again contact @AzureDevOps Team on Twitter or raise a customer support ticket