Fatal error: Uncaught Error: Call to undefined function add_filter() in /var/www/html/olympiads/wp-content/plugins-tmp-06-2023/gutenberg/lib/experimental/blocks.php:102 Stack trace: #0 {main} thrown in /var/www/html/olympiads/wp-content/plugins-tmp-06-2023/gutenberg/lib/experimental/blocks.php on line 102