Wordpress landing page plugin creating iframes, not permalinks

We have been using the Wordpress plugin for over a year to link our website to Infusionsoft landing pages and have followed the instructions found here: https://help.infusionsoft.com/help/new-landing-pages-wordpress-plugin. Recently though, the plugin has been embedding the pages as an iframe instead of creating a permalink which is now breaking our tracking and analytics. Any suggestions on how to get it to create a link again instead of an iframe?