Heroku rejecting push in mature application (pre-receive hook declined)

Question

I\'m getting

   FAILED: http://devcenter.heroku.com/articles/bundler

! Heroku push rejected, failed to install gems via Bundler To git@hero

Answer 1

Or, it could be that Heroku is having API issues and is down. Check https://status.heroku.com/

This happened to me today with a mature app.