Save Failed: There was an internal error..

Hello,

I developed a python script in an IDE and it always worked. I ported it to python in excel and it works. However, I frequently get this error. Often it is after I save a change that has some syntax problem. Despite removing the lines that caused the syntax error, suddenly any change doesn't work.

I could remove all of my code and write print('hello world') and I will get the save failed error.

I have tried:

• Pasting in old code from older, valid versions
• Removing all code and putting print('hello world')
• Updating Excel
• Repairing Excel
• Reinstalling Excel
• Restarting my computer
• Updating my computer
• Putting code in a new cell
• Putting code in a new work sheet
• Putting code into new workbook (this works but not forever, if the error happens again, I have to create a new workbook and that is incredibly inconvenient

Link to offending workbook:
https://1drv.ms/x/c/05ca45c91ad09cb7/EeQGntvd3sVFmieT7DBidP8B1z9Ga9d_BQg_cZ2VryoRqg?e=7IuKrw