Lovelace: card chooser is empty

I ran into an issue, which I am not able to solve myself. In my Lovelace frontend GUI, when adding a new card, the “card chooser menu” is empty. See screenshot:

I tried this on multiple browser (incl. Incognito), but it does not seem to be a cache-issue.

Does anybody have tips on troubleshooting, etc.? :slight_smile:

I’ve got the same issue today after doing some dashoard editing. No card shown at all, tried different browsers too. No idea at all where to go from here?

Ok, just solved it for me. Going to the raw configuration editor, there was a NULL line, commented that out, and all back again.