https://bugs.winehq.org/show_bug.cgi?id=47240
--- Comment #4 from paterson55@gmail.com --- (In reply to Timur Tabi from comment #3)
I am also affected by this bug. This makes Sketchup useless for me because I can't export the STLs.
Just came back to looking at Sketchup and found a simple workaround using the ruby console here https://github.com/SketchUp/sketchup-stl/issues/171
CommunityExtensions::STL::Exporter.export("Z:/home/your_user/model.stl", Sketchup.active_model.active_entities, {'selection_only' => false, 'export_units' => 'Model Units', 'stl_format' => 'ASCII'})