Same problem here. I recently downloaded CleanMyMac but it mucked up my Microsoft Office 11 software (purchased with my Mac 11 years ago)
Now I don't have access to any of my files. Word, Excel, Powerpoint, etc...
The Excel icon has completely disappeared.
What can I do to fix this?
I also cannot back up as ICloud doesnt seem to work and I don't have compatible drive with TimeMachine.
If I can find my original disks for Office, can I just reinstall the old office?
I am not sure what else to do.