Set or get iCal settings in my Profile

If I as an administrator user try to go into my profile to set an iCal connection to Google, that entry read as follows:

iCal integration URL: Key is not set. Please set key to enable publishing.

I cannot edit that field. And all but the top filed under Calendars contain the same message.

Check your config.php for values like these, set them appropriately

  'host_name' => '',
  'site_url' => '',