Thanks for the report. That looks strange.
Can you please try restarting the app and rebooting macOS?
Have you tried disabling all the third-party plugins?
Do you remember when it started happening?
If you mean you get this error when clicking any note on the note list, the error “missing” does not make sense since the app actually lists the selected note.
So, there must be something wrong that makes the app internally inconsistent.
I agree, I decided to uninstall all community plugins.
But I have to say that I’m somewhat disappointed that the app doesn’t protect against community plugins crashing the system. In addition to my above problem there was also a community plugin that would cause the app to hang.