White screen. Can't change background color, or draw ANYTHING.

Anyone experiencing this problem? I've been away from the application for almost 18 months. Upgraded Ubuntu from V20 to V22.04.5 LTS I started BricsCAD tonight, and encountered an error:

(1) Redsdk API error code

After some search, I learned that this has something to do with a hardware rendering issue. So I went into the settings menu and switched to software rendering. I restarted the app, and no more Redsdk error message. But my model space and paper space backgrounds are white, and I can't draw ANYTHING. I can select different colors for the backgrounds in the settings menu, but the screen remains white.