i've tried to install missing gem
$> bundle install
and got error because of installing below gem
sudo gem install bluecloth -v '2.1.0'
--ruby=/Users/raksa/.rvm/rubies/ruby-2.3.0/bin/ $(RUBY_BASE_NAME) extconf.rb:7:in `main': uninitialized constant Config (NameError) Did you mean? RbConfig CONFIG
extconf failed, exit code 1
is anyone know how to fix this?