If OpenGL is not working but the Vectorial engine is, then it is a video card/driver issue.
You don't say what version of Archicad you are using (you really should mention in your post or add it to your profile signature).
Archicad 22 now uses a newer version of OpenGL so you may need to upgrade (or even downgrade) your video card drivers.
Maybe your drivers have updated automatically?
There are a few post about this.
Here are a couple...
https://archicad-talk.graphisoft.com/viewtopic.php?f=13&t=66725&p=296950&hilit=openGL#p296950
https://archicad-talk.graphisoft.com/viewtopic.php?f=13&t=66537&p=296157&hilit=openGL#p296157
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11