Your mailfile opens fine, and your calendar opens fine, but when you try to make a new entry or modify an existing entry, a pop-up error appears:
“The linked document cannot be found in the view.” The only option is to click OK, and the error goes away, but no entries can be made.
This can happen in your own mailfile, or if you are a delegate to someone else. If you are a delegate, then owner or another delegate can usually perform the operations normally, even when you cannot.
Close Notes. Delete cache.ndk and bookmark.nsf. Open Notes again, which will automatically recreate the bookmark.nsf file, using the Workspace icons already in place. Open the calendar that was giving you trouble. New entries and modifications will now be allowed.