ruby - Gem install error (sass compass)

Question

When I want to install sass and compass, I get this message. Can someone help me?

Microsoft Windows [version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. Tous droits réservés.

C:UsersBk>gem install sass

ERROR:  While executing gem (Encoding::UndefinedConversionError)
    U+2019 to CP850 in conversion from UTF-16LE to UTF-8 to CP850

Answer 1

Open up a command prompt and type:

chcp 1252

Then run the installer again:

gem install sass

Unfortunately there's a known issue in some versions of Ruby regarding this. See here