Hi @moettinger
It seems there’s a conflict there. Could you please set WP_DEBUG to true to see any error messages on the page? Please take a look at this page to learn how to set it: https://codex.wordpress.org/Debugging_in_WordPress.
Also, could you please share the code you were using and the JSON export file of your field group so I can test it out on my installation?
Thanks 🙂
