Fatal error: Uncaught Error: Call to undefined function activate_plugin() in /home/eliza132/public_html/wp-content/mu-plugins/wp-media-recovery.php:4 Stack trace: #0 /home/eliza132/public_html/wp-settings.php(471): include_once() #1 /home/eliza132/public_html/wp-config.php(101): require_once('/home/eliza132/...') #2 /home/eliza132/public_html/wp-load.php(50): require_once('/home/eliza132/...') #3 /home/eliza132/public_html/wp-blog-header.php(13): require_once('/home/eliza132/...') #4 /home/eliza132/public_html/index.php(17): require('/home/eliza132/...') #5 {main} thrown in /home/eliza132/public_html/wp-content/mu-plugins/wp-media-recovery.php on line 4