This typically is the result of an errant character or extra spacing in Site Tracking. 
  1. Navigate to Administration>Sites & Settings
  2. Select the Site on the left
  3. Scroll to Site Tracking
  4. Review the code, removing an extra spacing in between lines. You may also need to regenerate the tracking code from your 3rd party provider, paste it into notepad, and then paste it into NetCommunity
  5. When finished, click Save