Fatal error: Uncaught Error: Call to undefined function add_action() in /var/www/vhosts/awxpokmt.host213.checkdomain.de/htdocs/playground/gravitysleep/wp-content/plugins/gutenberg/packages/block-library/src/categories/index.php:102 Stack trace: #0 {main} thrown in /var/www/vhosts/awxpokmt.host213.checkdomain.de/htdocs/playground/gravitysleep/wp-content/plugins/gutenberg/packages/block-library/src/categories/index.php on line 102