I have inherited a site that uses ACF with fields defined in PHP (I assume with the ACF tool to generate it). The site also uses a WordPress hook to disable Gutenburg; add_filter(‘use_block_editor_for_post’, ‘__return_false’);
When creating or editing a page and I attempt to change the page template, I’m getting a JS error:
Uncaught TypeError: Cannot read property ‘jQuery351050915779387886921’ of undefined
If I remove the filter to disable Gutenburg, then the error does not occur. If I remove the field definitions then the error does not occur.
Any ideas as to what the issue might be, or how I might troubleshoot it? Is there a way to reverse engineer the PHP back to ACF configuration?