When copying a Nintex workflow, Sharegate displays the following error:
The form type 'InfoPath' isn't supported for the 'Request Data' user interaction action. The default form type will be used instead.
This message is displayed when Sharegate processes the user interaction action "Request Data" in a Nintex workflow, if the action has InfoPath forms. Unfortunately, current limitations in the Nintex API prevents Sharegate from correctly setting the InfoPath form type for the 'Request data' user interaction actions. As a result, Sharegate fallbacks to the default form type.
Edit the Nintex workflow at your destination and find the action "Request Data". Edit the action and change the "Form type" from "Default" to "InfoPath", then republish the workflow.