Last Errors tab
The Last Errors tab lists recent errors and provides information for troubleshooting what is causing the error.
Clicking the triangle to the left of an error will expand the error details. The error details will provide all of the details about the exact request the was submitted that resulted in an error. It also will include the error message returned. This is a great help in identify the cause of errors without requiring you get details from the individual who submitted the request.