Cant share the log, but i think i got it (since it stopped working again). Last line in the history-log is a note called "untitled" which doesn't exist anymore. That error happens, when i create a new note, stay on it for 3 seconds, don't write anything and go to another note. Joplin deletes it, because its body is empty, history-plugin won't find it anymore and stops logging. Something like that...

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