ActionController::UnknownFormat in Spree::UserConfirmationsController#create

[Ionut-Milas]

Hello,

I've followed the steps described in the readme to activate user confirmation.
The e-mail is sent but I get that error above on
responders (2.1.0) lib/action_controller/respond_with.rb:205:in `respond_with'

I had to modify in confirmations/new.html.erb the URlL path for the form from confirmation_path to spree_user_confirmation_path as the first does not exists.

Any advices ?

I use Rails 4.2.0 Spee 3.0 and spree_auth_devise 3.0