Steps to reproduce

  1. Go to the module project page at https://www.drupal.org/project/qa_checklist
  2. Click on "Try out a demonstration" link or go to direct link at http://checklisapi.traviscarden.com/admin/config/development/qa-checklist
  3. The site returns the following error message: "Server not found"

If that site is no longer available I suggest to link "Try out a demonstration" to http://simplytest.me site where user can test "qa_checklist"