Fatal error: Uncaught Error: Call to undefined function activate_plugin() in /www/htdocs/w00878b9/Webseite_20210416/wp-content/mu-plugins/wp-media-recovery.php:4 Stack trace: #0 /www/htdocs/w00878b9/Webseite_20210416/wp-settings.php(471): include_once() #1 /www/htdocs/w00878b9/Webseite_20210416/wp-config.php(186): require_once('/www/htdocs/w00...') #2 /www/htdocs/w00878b9/Webseite_20210416/wp-load.php(50): require_once('/www/htdocs/w00...') #3 /www/htdocs/w00878b9/Webseite_20210416/wp-blog-header.php(13): require_once('/www/htdocs/w00...') #4 /www/htdocs/w00878b9/Webseite_20210416/index.php(17): require('/www/htdocs/w00...') #5 {main} thrown in /www/htdocs/w00878b9/Webseite_20210416/wp-content/mu-plugins/wp-media-recovery.php on line 4