I installed KiCad 9.0
All was fine initially but since Monday when I open my board in the PCB Editor the footprints and tracks are all invisible. They are all found as you would expect on a PCB update, until I click to place the new footprints I see the fab texts, but the footprints are invisible. once I click everything disappears.
I have found a discussion on this happening with version 8 but not 9.
A new project in 9 with one part and some random trace seems fine.
Any ideas?