question

Yes, the key error codes are listed in the "Global API method error codes" page. This page lists the common error codes that you might encounter and it’s incomplete. Actually, you can get error message directly in the responses or you can refer to the api documentation to obtain the error name, and the error cause can be roughly inferred from the error name. If you still don’t understand the error name , you can ask for additional information on the PlayFab forum.