Heroku push rejected, failed to install gems via Bundler

Question

I am struggling to push my code to Heroku. And after searching on Google and Stack Overflow questions, I have not been able to find the solution. Here is What I get when I t

Answer 1

1. bundle update
2. git add Gemfile.lock
3. git commit -m 'Update Gemfile.lock for Heroku'
4. git push heroku master

it worked for me.