"Cannot read property 'add' of undefined" error when using iFrame processor

Hello Frontity community,

Iā€™m running into a ā€œCannot read property ā€˜addā€™ of undefinedā€ error when trying to add an iframe to my site. Iā€™m importing the iframe processor from Frontity in my themeā€™s root and Iā€™m adding the iframe in my WP admin.

As a test, I used the iframe component to import a youtube video. If I add the component and save the file, the iframe renders on the page. When I refresh the page the error is thrown again.

Unfortunately this repository is private, but Iā€™m happy to provide more screenshots/details as necessary.