Sorry to hear about your experience. Would you mind sharing some more details, like the exact version of the OS/Illustrator and screenshots of the error message (if any), so we can investigate this further?
We understand that encountering technical issues can be frustrating. I hope Monika's suggestions helped resolve the problem. If not, kindly try the following steps to see if they help:
- Close all Adobe applications.
- Rename the UXP folder to UXP.old from the following location:
(Windows) Navigate to C:\Program Files\Common Files\Adobe\UXP
(macOS) Navigate to Macintosh HD/Library/Application Support/Adobe/UXP