I have some problems when I set up the plugins.
It will pop up a window that shows errors like that:
〔C:/Users/LINDA/AppData/Roaming/SketchUp/SketchUp 2018/SketchUp/Plugins/Fredo6_!LibFredo6.rb:28:in <top (required)>' Load file Fredo6_RoundCorner.rb happen error Error: #<TypeError: can't convert nil into an exact number> C:/Users/LINDA/AppData/Roaming/SketchUp/SketchUp 2018/SketchUp/Plugins/Fredo6_!LibFredo6.rb:79:in -'
C:/Users/LINDA/AppData/Roaming/SketchUp/SketchUp 2018/SketchUp/Plugins/Fredo6_!LibFredo6.rb:79:in <top (required)>' D:/SketchupPro2018/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:54:in require'
D:/SketchupPro2018/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:54:in require' C:/Users/LINDA/AppData/Roaming/SketchUp/SketchUp 2018/SketchUp/Plugins/Fredo6_RoundCorner.rb:47:in module:Fredo6'
C:/Users/LINDA/AppData/Roaming/SketchUp/SketchUp 2018/SketchUp/Plugins/Fredo6_RoundCorner.rb:26:in `<top (required)>'〕

Alough I have setted up LibFredo6 v9.5k and RoundCorner v3.3a
Can you help me please~~~~~
I need your help very much!!!!