The URL\'s seem right (Last updated them yesterday):
The files too:
There's a relatively fresh issue with omniauth-oauth2 gem version 1.4 https://github.com/intridea/omniauth-oauth2/issues/81#issuecomment-151038559
omniauth-oauth2
1.4
Temporary fix is to downgrade that gem explicitly in the Gemfile
Gemfile
gem 'omniauth-oauth2', '~> 1.3.1'