Hello

I am new on MSPhisics and still using SU 2019. Already tryed to install first AMS Library and MSPhisics by using "Install extension" and and locate the file .rbz in the plugin Folder.
The plugin after installation seems are installed but alway this message:

Error Loading File C:/Users/Giuseppe.-------/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/MSPhysics/main_entry.rb
Error: #<IOError: The required, staged c extension file, "C:/Users/Giuseppe.-------/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/MSPhysics/libraries/stage/win64/2.5/msp_lib.so", is missing!>
C:/Users/Giuseppe.---------/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/ams_Lib/extension_manager.rb:204:in block in require_all' C:/Users/Giuseppe.-------/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/ams_Lib/extension_manager.rb:201:in each'
C:/Users/Giuseppe.--------/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/ams_Lib/extension_manager.rb:201:in require_all' C:/Users/Giuseppe.--------/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/MSPhysics/main.rb:70: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/Giuseppe.--------/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/MSPhysics/main_entry.rb:15: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/Giuseppe.-------------/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/MSPhysics.rb:21:in register_extension'
C:/Users/Giuseppe.---------/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/MSPhysics.rb:21:in <module:MSPhysics>' C:/Users/Giuseppe.------/AppData/Roaming/SketchUp/SketchUp 2019/SketchUp/Plugins/MSPhysics.rb:5:in <top (required)>'.

Any one have suggestions ?
What's going one ?

Thank's

Giuseppe