error to installing sass with gem in windows 8.1

Question

I'm installing ruby in windows 8.1 pro

ruby 2.1.3p242 (2014-09-19 revision 47630) [x64-mingw32]

and gem version

2.2.2

when in execute the gem installation throw this error :

ERROR:  Loading command: install (ArgumentError)
        unknown encoding name - CP720
ERROR:  While executing gem ... (NoMethodError)
    undefined method `invoke_with_build_args' for nil:NilClass

Answer 1

This command will fix it -- you need to change the code page of the current terminal.

chcp 1252