Just tested it with Proton: 1657128959 experimental-7.0-20220706. The game now runs with only 3 issues I have noticed. 1. The intro movie does not play. 2. If I turn on advanced lighting everything but the UI/Menus turns...
@RockafellaJaz Thanks for the report. I've found the cause of the issue and reported it on our internal bug tracker. We will hopefully have a fix for this soon.