Thea Rendering Resolution

I have recently upgraded to Thea 4; I’m still using Sketchup 2023. They now only have Presto (and nitro, but have never used it) and I cannot get any kind of resolution, no matter how long I leave it. Also the resolution change makes no difference to the render. Very frustrating. What am I doing wrong? This is what I get:

Have you tried contacting the Thea folks?

Please update your forum profile. It says you’re using SketchUp 2017.

What’s the graphics card? 22 doesn’t tell us anything.

Maybe there’s something here that will help.

Or this:

I’ve seen these links, thanks DaveR. My graphics card is the latest Nvidia ; checked that. It all worked fine with Thea 3.5 and have had great results but now…the abyss