Thank you for the information.
By SU I meant SketchUp: what SketchUp version are you using. But now I see it from the screnshot in the post above: 2017. The version I’ve exported the scene with success was 2018. I will try again with SketchUp 2017 to check if it matters.
Right, we are also suspecting some problems related to non-Latin characters in directories or texture file names, however we do not have anything concrete yet.
Can you send us the problem report from the “Help & Support” tab of the main Shapespark window? The logs attached to the report should give us more information about the problem.