Problem with the material palette opening.
When starting up sketchup 2021, I go to open the material bucket, which opens ok, then I click on the Texture Palettes, this then hangs for several minute. it seem to have an issue with ready a texture I think.
Interesting when it does open and it open on the ‘Tiles’ - one of my categories, the images are blurred and elongated not square images. them when I click another category and the images are square. Then it is all good.
But it hangs when first clicking on the Texture palette. Anyway to reset this?
Are you running a bootcamp (etc) or macOS?
Is SketchUp Pro properly installed or do you run it directly from the downloaded disk image?
Sketchup is properly installed, downloaded from Trimble. Never had a problem previously.
What happens if you Disable the extensions, and then restart SU?