I'm running out of ideas here but that's how would I proceed in your situation

  • Deleting repeatedly faulty items stated in the logs

here are the relevant lines

Synchronizer: Sync: createRemote: remote does not exist, and local is new and has never been synced: Resource: (Local 53dc2a9a0ffa4a408b88532343f8fe89)

11-17T12:29:33: Synchronizer: Sync: createRemote: remote does not exist, and local is new and has never been synced: Folder: (Local 1ea901982dc94e65a1ce21b6389095c3)

Can be searched as "createRemote"

  • Disabling all the plugins

  • Disabling the encryption

  • Reinstalling the app

    • You can put the unsynced notes into a separate folder and export your profile.
      • Sort all notes by updated date
      • Put important ones into separate folder -- to make it easier to import later
      • Configuration -- Import&Export
    • if you decide to go with it, make sure that first sync is complete FAQ | Joplin