Hello, Can you explain to me why the avast app is included in this answer? I have the same problem but do not have (or intend to) the Avast app installed.
All good before I jumped from OSX 10.3 to 12.4
The short answer is that Monterey has tightened down security on access to external drives, so if you installed the new system over an existing install, Monterey has probably reset your Adobe apps to a more restrictive setting.
Check System Preferences > Security & Privacy > Full Disk Access (on the left). If your Adobe apps are listed but not checked, check them. If they aren't there at all, add them. The easiest way is to drag each app into that window.
This issue has also been causing people problems with linked files not behaving properly if they are also on an external drive. Giving the apps Full Disk Access should resolve this as well.