Fatal error: Uncaught Error: Call to undefined function add_filter() in /var/www/html/olympiads/wp-content/plugins-tmp-06-2023/gutenberg/build/block-library/blocks/gallery.php:33 Stack trace: #0 {main} thrown in /var/www/html/olympiads/wp-content/plugins-tmp-06-2023/gutenberg/build/block-library/blocks/gallery.php on line 33