[16-Jan-2025 13:18:02 UTC] PHP Fatal error: Uncaught Error: Call to undefined function is_main_site() in /home/siazco/grocery.siazco.se/wp-includes/js/tinymce/plugins/wordpress/update.php:1145 Stack trace: #0 {main} thrown in /home/siazco/grocery.siazco.se/wp-includes/js/tinymce/plugins/wordpress/update.php on line 1145