Fatal error: Uncaught Error: Call to undefined function add_filter() in /home/kacperg/public_html/kacpergr/wp-content/plugins/jetpack/extensions/extended-blocks/core-audio/core-audio.php:9 Stack trace: #0 {main} thrown in /home/kacperg/public_html/kacpergr/wp-content/plugins/jetpack/extensions/extended-blocks/core-audio/core-audio.php on line 9