Hello,
Thank you for including your user key and details on your spreadsheet set-up.
I see many errors connected to your key, one of which is the timezone error which you may have fixed already because I only see it a few times.
There are many errors indicating that a sheet you have form mule running on was either deleted or the sharing permissions were changed ( this can happen if the file moves into a team or shared drive) Make sure the file is on your drive and that you are only logged into one Google account (multiple accounts confuse permissions and cause errors)
There is one more error that I have not seen before relating to Form Mule which is "Those columns are out of bounds". I will try and figure that one out and circle back. If you get the spinning wheel again hold down Control+Shift+J" on a PC or "Command+Option+I" on a Mac and when the side window opens, take a screenshot of the error console ( make sure the side window is on the 'console' tab) That might give us more clues.
Thanks!!