the server reports on debug mode with 1 error but no error file on logs folder.
Server Reports 1 error
I think it is automatic. Make sure if the server says it has an error you are checking the Server/Data/Logs folder. If nothing is there then you can create errors.txt yourself and see if it logs the error. Generally though, if an error gets logged and the server does not completely crash it is extremely minor and nothing to worry about, just stuff we should look into to be sure.