This issue can occur if a Google Tag Manager script has been added in the site tracking field under Administration > Sites & Settings. To resolve this issue, the code will need to be removed from site tracking and added to the site using the steps in our article, How to add Google Tag Manager to NetCommunity.
To remove the tracking code from site tracking:
- Navigate to Administration > Sites & Settings.
- Select the site level from the left hand navigation tree.
- Under site tracking, remove the Google Tag manager script and unmark the enable site tracking checkbox.