Password reset fails

[fjenett]

http://localhost:9292/users/password?score_id=deborah_hay

Generates:

ArgumentError in Devise::Passwords#create
Showing [...]/app/views/devise/mailer/reset_password_instructions.html.haml where line #4 raised:

Missing host to link to! Please provide the :host parameter, set default_url_options[:host], or set :only_path to true

  %p
    Hello #{@resource.email}!
  %p Someone has requested a link to change your password. You can do this through the link below.
  %p= link_to 'Change my password', edit_password_url(@resource, :reset_password_token => @token)
  %p If you didn't request this, please ignore this email.
  %p Your password won't change until you access the link above and create a new one.