This error happens because the default code for Simplesat NPS surveys exceeds the character limit in Zendesk trigger or automation email notifications.

The workaround is to reduce the size by removing all parameters in the rating URLs and instead rely on the direct API connection with Zendesk. 

In order for the ticket lookup to work, you'll need to activate the Zendesk integrations. Otherwise, the responses would show as anonymous.

To remove the all parameters in the rating URLs, find the survey that you want to use, and go to the Publish tab.

Click the Remove placeholders from rating URLs box. Generate the embeds and copy the codes. Then, paste it to your ticket notification template.