enabling problem

Hello everyone,

I got some problem with enabling LumenRT through OpenRoads Designer CE 2022. When I try to open my prepared model in LumenRT, window that appears doesn't show my model instead I get something like scrambling bright dot:

In the model there are some meshes with textures and solids, moreover everything worked properly before, now I've tried to detach and attach the references, make a new file, restart computer etc, but nothing helps.

Did someone have similar problem? I'd be grateful for answer.