A survey I created about 3.5 years ago has been having issues lately. It's used multiple times a day, and normally there are no issues. When issues do come up, it's when they try to re-submit a survey that's already been submitted. Previous issues that have been brought to my attention were when they tried to add another signature to the image repeat question and resubmit, and today's was trying to submit a survey from yesterday as a new survey for today because all of the same information applied. The error just says "failed to submit", with no error code to search for, and no information to go off of.
Any suggestions for what could be wrong? I feel like the ultimate solution is going to be to create a new survey and have them use that one, but I'm trying to avoid that.