Zend certified PHP/Magento developer

Page builder new element knockout issue

I’m new to web development with Magento. Unfortunately, I’ve run into an issue with the page builder. Any advice would be appreciated.

I’ve attempted to create a new element following the example provided here and the Text element that comes out of the box.

However, when I attempt to add the new element with the page builder, knockout.js complains that it can’t retrieve data.content.css from data.content.

After it started doing that, I removed all the special properties from both the master and preview templates, so it should just be rendering static HTML, but it’s still throwing the same error.

What might I be missing that could cause this issue?

Thanks in advance.