I was using devise and omniauth to "login with google/yahoo" to a site I'm building. It worked fine, but now I came back some days later and it does not work anymore, it throws this in the logs: WARNING: Can't verify CSRF token authenticity
"login with facebook" works fine.
What could have changed? I don't remember touching anything. Maybe I run bundle install and something changed.
Any ideas on how to fix this?