anonymous user Thanks for reaching out. As per your screenshot shared, I can see there was error executing your function app but I don't see the exception message/details why the function execution was failed. The exception details should have more details on the failure. But in case if you don't see the stack trace then I will suggest you to review the application insights logs to find the root cause of the failure. You can also refer to Diagnose and solve problem blade to find more details and the action plan to resolve the issue.
As you are using the DefaultAzureCredential() so you should assignee the role correctly for the user assigned/system assigned identity.