Error Loading File Fredo6_!LibFredo6.rb
Error: #<ArgumentError: invalid byte sequence in UTF-8>
c:/users/정영호/appdata/roaming/sketchup/sketchup 2020/sketchup/plugins/fredo6_!libfredo6/top_libfredo6.rbe:45:in gsub' c:/users/정영호/appdata/roaming/sketchup/sketchup 2020/sketchup/plugins/fredo6_!libfredo6/top_libfredo6.rbe:45:in get_dir_from_ENV'
c:/users/정영호/appdata/roaming/sketchup/sketchup 2020/sketchup/plugins/fredo6_!libfredo6/top_libfredo6.rbe:425:in su_appdata' c:/users/정영호/appdata/roaming/sketchup/sketchup 2020/sketchup/plugins/fredo6_!libfredo6/top_libfredo6.rbe:443:in dir_appdata'
c:/users/정영호/appdata/roaming/sketchup/sketchup 2020/sketchup/plugins/fredo6_!libfredo6/top_libfredo6.rbe:206:in startup' C:/Users/정영호/AppData/Roaming/SketchUp/SketchUp 2020/SketchUp/Plugins/Fredo6_!LibFredo6.rb:62:in process'
C:/Users/정영호/AppData/Roaming/SketchUp/SketchUp 2020/SketchUp/Plugins/Fredo6_!LibFredo6.rb:69:in <module:LibFredo6_Loader>' C:/Users/정영호/AppData/Roaming/SketchUp/SketchUp 2020/SketchUp/Plugins/Fredo6_!LibFredo6.rb:30:in <top (required)>'

i experienced load errors.
Plz tell me how to fix it