Unsupported Widget - Unnamed, Can't Remove

I’m busy redoing my panels configuration. Whenever I open Edit Mode, and then go to Add or Manage Widgets, there’s this phantom widget that appears before all the others. Hovering over it says it is Unsupported.

The issue is I’ve got no clue what widget it actually is. I would like to remove it, but I can’t find it. I checked under ~/.local/share/plasma/plasmoids, and there are four folders there, and each of those four is listed, so it’s not one of those.

The only other place that plasmoids are listed is in /usr/share/plasma/plasmoids, but those are the system ones, so I’m very wary of dealing with those. As far as I know, all of those are the default ones from KDE Plasma, except for Panel Colorizer, which is listed (I installed it through the AUR).

Is there a way I can find what the wrong widget is, and remove it?

I was able to solve it. Turns out that installing KClock through pacman added a widget for that, but it wasn’t packaged correctly, so the metadata never showed up. Just removing that app got rid of the Unsupported Widget.