Error: The following error(s) must be corrected before continuing: The server tag is not well formed - when sending an email or reaching a confirmation page on a form in NetCommunity

We receive the following error message when attempting to send an email message or complete an online form from NetCommunity:

The following error(s) must be corrected before continuing:
The server tag is not well formed.
This issue has been caused by an issue with the email HTML or HTML code inside of the confirmation page on a NetCommunity form. This has been observed when adding custom JavaScript or third party code which can cause a conflict internally as a result. To resolve, perform the following: 
  1. If issue is within an email, review all existing code/content and remove any third party code
    • Example: Social Media icon buttons, Email Tracking tags, etc...
     
    • If the issue is with a Donation, Event, or other form, remove all JavaScript or customized code from the Custom Confirmation Screen
      • Example: Any HTML between <script> tags, custom "Share This" widget code, Google Tracking Code, etc....
       
      • Once all the content/code has been reviewed, test the form or email to confirm if the error still appears
      If the error still appears after removing all customized code Click Chat with Support and reference this article

      Environment

       6.45.2034 patch 15

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