Main panel/ desktop fail to load

How do I diagnose Plasma when this is happening:

The browser(Vivaldi) has loaded, Thunderbird has loaded, I can access anything on Latte dock, but the desktop background, and main panel/menu/clock etc are not loading. I’ve not changed anything recently, but have been doing the usual rolling updates.

Check your compositor settings.

1 Like

Hmmm, so 3 reboots later, it’s going…weirdness. I have not touched anything in the compositor.

Who knows… To err is human, but to really foul things up requires a computer.

and further proof: