Hi! This error appears when SU starts. As far as I understand there is some problem with QuadFace tools plugin from ThomThom. When I delete it the problem disappears. And when try to reinstall this plugin again the problem comes back. I use SketchUp 2019 PRO version.
<main>:in `<main>'
C:/Users/HYPERPC/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/TT_Lib2/settings.rb:51:in `eval'
C:/Users/HYPERPC/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/TT_Lib2/settings.rb:51:in `read_default'
C:/Users/HYPERPC/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/TT_Lib2/settings.rb:51:in `[]'
C:/Users/HYPERPC/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/TT_Lib2/settings.rb:96:in `set_default'
C:/Users/HYPERPC/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/TT_QuadFaceTools/core.rb:63:in `<module:QuadFaceTools>'
C:/Users/HYPERPC/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/TT_QuadFaceTools/core.rb:35:in `<top (required)>'
C:/Program Files/SketchUp/SketchUp 2019/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:59:in `require'
C:/Program Files/SketchUp/SketchUp 2019/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:59:in `require'
C:/Users/HYPERPC/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/TT_QuadFaceTools/bootstrap.rb:35:in `<top (required)>'
C:/Program Files/SketchUp/SketchUp 2019/Tools/extensions.rb:197:in `require'
C:/Program Files/SketchUp/SketchUp 2019/Tools/extensions.rb:197:in `load'
C:/Users/HYPERPC/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/TT_QuadFaceTools.rb:54:in `register_extension'
C:/Users/HYPERPC/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/TT_QuadFaceTools.rb:54:in `<module:QuadFaceTools>'
C:/Users/HYPERPC/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/TT_QuadFaceTools.rb:15:in `<module:Plugins>'
C:/Users/HYPERPC/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/TT_QuadFaceTools.rb:14:in `<module:TT>'
C:/Users/HYPERPC/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/TT_QuadFaceTools.rb:13:in `<top (required)>'```