[ERROR] help#contact (ActionController::ParameterMissing) "param is missing or the value is empty: contact"

[gbp]

An ActionController::ParameterMissing occurred in help#contact:

  param is missing or the value is empty: contact
  app/controllers/help_controller.rb:83:in `contact_params'

-------------------------------
Request:
-------------------------------

  * URL        : https://www.whatdotheyknow.com/help/contact
  * HTTP Method: POST
  * Parameters : {"utf8"=>"✓", "authenticity_token"=>"", "contact[understand]"=>"1", "contact[name]"=>"abc", "contact[email]"=>"foo@bar.com", "contact[subject]"=>"abc", "contact[comment]"=>"abc", "current_form"=>"wdtk", "submitted_contact_form"=>"1", "commit"=>"abc", "contact[message]"=>"abc", "controller"=>"help", "action"=>"contact", "help"=>{"contact[understand]"=>"1", "contact[name]"=>"abc", "contact[email]"=>"foo@bar.com", "contact[subject]"=>"abc", "contact[comment]"=>"abc", "current_form"=>"wdtk", "submitted_contact_form"=>"1", "commit"=>"abc", "contact[message]"=>"abc"}}