The newest versions of Notability automatically stash your Notes in iCloud – which is nice UNTIL something goes awry.
Notability is as slow as Christmas, and you see the “I’m-working-on-it-spinning-icon” more often than not.
We’ve also seen where Notability was trying to bring back notes from LAST YEAR which were not needed [nor appreciated].
Notability has offloaded some of your notes in iCloud, and is having trouble fetching them back.
HOW TO FIX IT:
FIRST: Make absolutely sure your notes are backed up to Google Drive. If you haven’t organized them using Subjects and Dividers, now is a REAL good time to set that up. It will save TONS of time later.
SECOND: In Notability, go into Settings –> iCloud. Turn it OFF.
You very well might see some of your notes, dividers, and subjects disappear. If that happens, setup the notes and dividers again manually, and then download the missing material from Google Drive.