Go to System Preferences > Security & Privacy > Privacy > Full Disk Access and ensure Adobe Illustrator is added and checked.
If none of the above works, the file structure itself is likely compromised. You need to migrate your artwork to a clean file. illustrator parm error
Remember: When Illustrator throws a PARM error, it’s not your fault—it’s a conversation breakdown between the software and its data. With a little detective work, you can get back to designing. Go to System Preferences > Security & Privacy
Here is how to fix it, ranked from the easiest solution to the "nuclear option." illustrator parm error