[Userscript] Wanikani Heatmap

[Sinyaven]

Isn’t this the code that loads stuff from the IndexedDB? My guess would be that one of the DB entries is null for some reason.

EDIT: @worstcasescenario

You could check whether your IndexedDB contains null values in the developer tools.

1. Switch to the Application tab
2. Open the wkof IndexedDB
3. Check if any database entry is null
4. Select it and delete it