Please install ruby first.

$/> ruby -v
ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [x64-mingw-ucrt]
$/> gem install sass
......
1 gem installed
$/> gem install compass
......
1 gem installed
$/> sass -v
Ruby Sass 3.7.4
$/> cd SassScripts
$/SassScripts> sass table.scss output.css