I\'ve seen a few posts similar to this but with no solutions, so I figured I would present a more documented problem.
My Problem JS from manifest fi
I had the same problem, took long time to find a solutions to this.
I just switched back to ruby-1.9.3-p429, and it resolved the problem. I don't know how to manage it with ruby 2 patches. I have used ruby-2.0.0-p247 and ruby-2.0.0-p195.
So, just do rvm use ruby-1.9.3-p429. Then run 'bundle update'. Then clear the Rails cache by running Rails.cache.clear in the console and also don't forget to clear the browser cache.
Hope it goes fine. :)-