After opening Signage Studio and about 5 saves in I am unable to save/upload anymore. I've been working in the program for a week now and haven't seen this issue until today. I have to close out of the program, losing work in the process. I've tried logging-out and logging-in again to no avail.
The error message I receive says-
"Error was sent to server for further investigation. Sorry for the inconvenience. Submit to the server fail."
You have to click OK to close the error screen.