Fatal error: Uncaught Error: Call to undefined function add_filter() in /nfs/bronfs/uwfs/hw00/d67/cerse/wordpress/wp-includes/block-supports/elements.php:231 Stack trace: #0 {main} thrown in /nfs/bronfs/uwfs/hw00/d67/cerse/wordpress/wp-includes/block-supports/elements.php on line 231