Hello,
Follow these steps to solve the issue:
Update your Anki. You can download it here: https://apps.ankiweb.net/. After downloading, simply run the downloaded file to update your application.
Update your AnkiHub add-on:
- On your Anki main screen, go to
Tools > Add-ons > Check for Updates. - After the update is complete, please restart Anki.
- Check Database: Open Anki, go to the top menu, and select Tools > Check Database. This is Anki’s built-in maintenance utility. It will scan for orphaned notes, rebuild broken relationships, and clean up cards attached to missing note types.
- Empty Cards: Run Tools > Empty Cards to clear out any blank cards that might have been generated by the missing data.
- Restart and Sync: Close Anki, reopen it, and manually trigger the AnkiHub sync again.