Dear Anton_S

After installation of MSPhysics & AMS Library by sketchUcation extensionstore v4.1.0 following is the error message keep pops up as I start sketchup pro 2021. Anticipating your answer with solutions. Thank you very much in advance.
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C:/Users/bernard/AppData/Roaming/SketchUp/SketchUp 2021/SketchUp/Plugins/MSPhysics/main_entry.rb file load error
Error: #<IOError: The required, staged c extension file, "C:/Users/bernard/AppData/Roaming/SketchUp/SketchUp 2021/SketchUp/Plugins/MSPhysics/libraries/stage/win64/2.7/msp_lib.so", is missing!>
C:/Users/bernard/AppData/Roaming/SketchUp/SketchUp 2021/SketchUp/Plugins/ams_Lib/extension_manager.rb:219:in block in require_all' C:/Users/bernard/AppData/Roaming/SketchUp/SketchUp 2021/SketchUp/Plugins/ams_Lib/extension_manager.rb:216:in each'
C:/Users/bernard/AppData/Roaming/SketchUp/SketchUp 2021/SketchUp/Plugins/ams_Lib/extension_manager.rb:216:in require_all' C:/Users/bernard/AppData/Roaming/SketchUp/SketchUp 2021/SketchUp/Plugins/MSPhysics/main.rb:70:in <top (required)>'
C:/Program Files/SketchUp/SketchUp 2021/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:92:in require' C:/Program Files/SketchUp/SketchUp 2021/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:92:in require'
C:/Users/bernard/AppData/Roaming/SketchUp/SketchUp 2021/SketchUp/Plugins/MSPhysics/main_entry.rb:15:in <top (required)>' C:/Program Files/SketchUp/SketchUp 2021/Tools/extensions.rb:197:in require'
C:/Program Files/SketchUp/SketchUp 2021/Tools/extensions.rb:197:in load' C:/Users/bernard/AppData/Roaming/SketchUp/SketchUp 2021/SketchUp/Plugins/MSPhysics.rb:21:in register_extension'
C:/Users/bernard/AppData/Roaming/SketchUp/SketchUp 2021/SketchUp/Plugins/MSPhysics.rb:21:in <module:MSPhysics>' C:/Users/bernard/AppData/Roaming/SketchUp/SketchUp 2021/SketchUp/Plugins/MSPhysics.rb:5:in <top (required)>'