Issue
Values are entered in the form when the Document Package is run but those values do not populate on the output document
Resolution
Confirm that the tags to be used do not include any spaces (<<do not look like this>> <<but_this_is_okay>>) and if they do, they will need to be updated in the Document Package as well as the template
DocGen Forms: https://help.nintex.com/en-US/docgen/docservices/#docgen-sfdc/Services/manageDDP/t_Forms.htm
