Two ideas…
Is the driver for your Graphics Card up to date ?
When you installed SketchUp it has to be done in the proper way.
Other ways may appear to have worked, but down the line unpredictable weird issues can arise…
Here’s the only proper way…
Log into your PC using your normal user-account: NOT the separate administrator account - BUT if your normal user-account gives you admin powers that is OK.
Make sure SketchUp is closed.
Find the installer exe file - it’s probably in your Downloads folder ?
Select its icon, right-click > context-menu > “Run as administrator”
When prompted choose “Repair”.
When it completes retest…
Note that if you have uninstalled SketchUp you will be prompted to “Install” instead.
Double-clicking the exe file to Run it, is NOT the same as running it properly - even if you do have admin-powers some things will not get set up properly…