Hello!
I have an App that creates a new line item in an excel file with each submission click. It was working, but as of this morning is throwing this error:

I ran the monitor screen, but it didn't tell me much (at least not much to me):

This is the only app I have created, so I am not sure where to start with debugging. Any suggestions with things to check is welcome! Also happy to provide more info that might be helpful.
Thank you in advance.