Authorization Not Performed

[abacha]

I`ve installed the activeadmin gem and also this one and I'm getting this error:

CanCan::AuthorizationNotPerformed in Admin::DashboardController#index

This action failed the check_authorization because it does not authorize_resource. Add skip_authorization_check to bypass this check.

[11factory]

Have you configured your application controller class to handle authorization errors as mentioned in project page ?
Can you show me you ability class ?