Update devise.rb

Author: tgaeta

config/initializers/devise.rb

@@ -310,4 +310,5 @@
   # When set to false, does not sign a user in automatically after their password is
   # changed. Defaults to true, so a user is signed in automatically after changing a password.
   # config.sign_in_after_change_password = true
+  config.secret_key = Rails.application.secret_key_base
 end