Hi, thanks for responding. I did think just remove the note and see what happens. It resulted in a different file being referenced and couched in the same error message.
I recently downloaded Joplin and move selected notes and a notebook from evernote as I am looking for an evernote replacement.
Thank you for your help. I am in the get-to-know-Joplin phase so I am exporting just a few sample EverNote notes and notebooks. I erased all the files from Joplin and NextCloud, did a shutdown, and started my laptop.
Next, I exported and imported a few sample EverNote notes and notebooks. This time, no error messages!!