For render, downloaded .skp file and opened with SketchUp Pro 2019 trial. Similarly, downloaded Thea (trial version, 2.1.909.1853) and extended in sketchUp. All doing well until “scenes” were sent to Thea render window for rendering.
Thea can’t load “scenes” from SketchUp.
If this is set to run for maximum time, you may not need to check the optix noise reducer that can have memory issues depending on your system. I dont know what your scene is but 10 minutes cap on presto might be worth a test?