Error:-

 Solution:-
Step1:-
Temporarily remove secure connection:

gem sources -r https://rubygems.org/

Step2:-
Add insecure connection


gem sources -a http://rubygems.org/

Step3:-
Install compass gem



Step4:-
After installing compass do vice versa:

a) gem sources -r http://rubygems.org/ – to remove insecure connection

b) gem sources -a https://rubygems.org/ – to add secure connection

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