I figured out what Nick was suggesting, and the following is the error number & description that I\'m getting:
\'-2147417848 (80010108)\' Automation
I had the same issue, with some macros that were working for everyone but not 1 person.
I solved it by asking the person to not use a folder that was synced to OneDrive, so be careful when using OneDrive.
I had other cases where OneDrive marked downloaded files from BOX or other file sharing services as read only, and made macros error out. And all you would need to do is open the file, save it and open it up again, but allot of people blamed it on my macros. It took me a while to find the cause, and to find a way to save an reopen the file using macros, before it actually opens...