Hi John, I have a lot of different field types in my form. Tested it with simple text fields only after your comment, but the error persists.
But good news – I solved it 5 minutes ago by adding wp-util as a dependency to my main script:
wp_enqueue_script( 'app', asset_uri('assets/js/app.js'), array('jquery', 'wp-util'), null, true );
So maybe you guys just forgot to add it as a dependency in acf_form_head?
