All colors appear as black

Hello!

I just upgraded to Toon Boom Stage 10.3 and whenever I try to draw or import a project all colors appear as black, both in camera view and drawing view. In the library, however, the colors appear just fine.

I’ve attached two images here: one is from an imported project (the KarateRabbit) and the other is an example of what happens when I try to draw.

I’ve tried re installing it and changing some settings from the OpenGL tab in the preferences menu, but nothing works. Can anybody help me?