/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bundler-1.16.0/lib/bundler/runtime.rb:84:in `rescue in block (2 levels) in require': There was an error while trying to load the gem 'rails_admin'. (Bundler::GemRequireError)
Gem Load Error is: uninitialized constant Haml::Util::Sass
Backtrace for gem load error is:
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/haml-3.1.8/lib/haml/util.rb:348:in `try_sass'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/haml-3.1.8/lib/sass/rails3_shim.rb:1:in `<top (required)>'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/sass-3.5.3/lib/sass/root.rb:1:in `<top (required)>'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/sass-3.5.3/lib/sass/util.rb:11:in `<top (required)>'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/sass-3.5.3/lib/sass/version.rb:2:in `<top (required)>'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/haml-3.1.8/lib/haml/util.rb:347:in `try_sass'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/haml-3.1.8/lib/sass.rb:6:in `<top (required)>'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bootstrap-sass-2.3.2.2/lib/bootstrap-sass/sass_functions.rb:1:in `<top (required)>'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bootstrap-sass-2.3.2.2/lib/bootstrap-sass.rb:10:in `load!'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bootstrap-sass-2.3.2.2/lib/bootstrap-sass.rb:51:in `<top (required)>'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/rails_admin-0.0.5/lib/rails_admin/engine.rb:4:in `<top (required)>'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/rails_admin-0.0.5/lib/rails_admin.rb:1:in `<top (required)>'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bundler-1.16.0/lib/bundler/runtime.rb:81:in `require'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bundler-1.16.0/lib/bundler/runtime.rb:81:in `block (2 levels) in require'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bundler-1.16.0/lib/bundler/runtime.rb:76:in `each'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bundler-1.16.0/lib/bundler/runtime.rb:76:in `block in require'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bundler-1.16.0/lib/bundler/runtime.rb:65:in `each'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bundler-1.16.0/lib/bundler/runtime.rb:65:in `require'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bundler-1.16.0/lib/bundler.rb:114:in `require'
/home/kashif/rails/alisa/metnet/config/application.rb:7:in `<top (required)>'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/railties-3.2.11/lib/rails/commands.rb:53:in `require'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/railties-3.2.11/lib/rails/commands.rb:53:in `block in <top (required)>'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/railties-3.2.11/lib/rails/commands.rb:50:in `tap'
/home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/railties-3.2.11/lib/rails/commands.rb:50:in `<top (required)>'
script/rails:6:in `require'
script/rails:6:in `<main>'
Bundler Error Backtrace:
    from /home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bundler-1.16.0/lib/bundler/runtime.rb:80:in `block (2 levels) in require'
    from /home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bundler-1.16.0/lib/bundler/runtime.rb:76:in `each'
    from /home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bundler-1.16.0/lib/bundler/runtime.rb:76:in `block in require'
    from /home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bundler-1.16.0/lib/bundler/runtime.rb:65:in `each'
    from /home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bundler-1.16.0/lib/bundler/runtime.rb:65:in `require'
    from /home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/bundler-1.16.0/lib/bundler.rb:114:in `require'
    from /home/kashif/rails/alisa/metnet/config/application.rb:7:in `<top (required)>'
    from /home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/railties-3.2.11/lib/rails/commands.rb:53:in `require'
    from /home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/railties-3.2.11/lib/rails/commands.rb:53:in `block in <top (required)>'
    from /home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/railties-3.2.11/lib/rails/commands.rb:50:in `tap'
    from /home/kashif/.rvm/gems/ruby-2.2.5@metnet2/gems/railties-3.2.11/lib/rails/commands.rb:50:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'