Thought I would try here before rushing off to Tech support - I'd say that the issue is it's reading the P6 serial as it was fine before I installed P6. I'll post back if we get to the bottom of it....

The supreme irony of life is that hardly anyone gets out of it alive.
Robert A. Heinlein

11th Gen Intel(R) Core(TM) i9-11900K @ 3.50GHz   3.50 GHz
64.0 GB (63.9 GB usable)
Geforce RTX 3060 12 GB
Windows 11 Pro