rails 4.2 app works in development, not in production

what are the most common causes

make sure you add gems pg and rails_12factor to group :production do and bundle install --without production… push to git and push heroku master… That should work

I already have those gems in my gemfile for production group; Why should I push it to github and i don’t know what push heroku is

1. configuration errors 2. coding errors

You might get a better response if you describe the actual problem e.g. what "works ... not" means, EXACT error message(s), etc.

I didn’t notice the s at the end of the https string Let’s close this cause I need to setup sitewide ssl in production I didn’t realize I’m not the author of the site