Problems with deploying to Heroku

I am having difficulty deploying my application to Heroku (using the free 5MB space plan). The commands I have used are:

heroku create, git push heroku master, and heroku rake db:migrate. All of which worked fine. I can see my st开发者_如何学JAVAartpage. I got postgresql running with a user model using devise gem. I can even access my sign_up and sign_in views.

However, after sign_up or sign_in I get a 500 error.

Note that this doesnt happen in development mode. Any advice?

For the error you're receiving with Devise::Encryptors::BCrypt, check out this GitHub issue.