I am suddenly getting this error in development and in production on deployment.
custom.css.scss
@import \"bootstrap-sprockets\";
@import \"bootstrap
make sure you run the following commands after adding this gem to your Gemfile put this inside your Gemfile
gem "bootstrap-sprockets", "~>3.3"
gem "bootstrap"
now stop your server and run the following:
bundle install
rails server
to restart your server. Refresh your browser and you should see changes reflect immediately. In production you may have to run this command to precompile your assets:
bundle exec bin/rake assets:precompile
It worked for me. Hope this was helpful.