How do I restore the panel?

On reboot this morning, my panel was all grey, although the icon pop up messages appear the icons are invisible, so after messing with it via edit it only got worse.

So I deleted it and added a new default panel, though this too was messed up, although the icons were visible I could not edit it back into shape.

Also tried restoring to an older image and, the panel issue still remained?

So what to do?

Can you provide some sort of screenshot ? or plasma settings info you have
Have you tried changing themes and other setting to see if it works ?