Fatal error: Uncaught TypeError: spl_autoload_unregister(): Argument #1 ($callback) must be a valid callback, class "ComposerAutoloaderInitb377fb3f542bb9303d4893f1901535a7" not found in /srv/users/serverpilot/apps/tebakskor/public/wp-content/plugins/wp-user-manager/vendor-dist/composer/autoload_real.php:26 Stack trace: #0 /srv/users/serverpilot/apps/tebakskor/public/wp-content/plugins/wp-user-manager/vendor-dist/composer/autoload_real.php(26): spl_autoload_unregister(Array) #1 /srv/users/serverpilot/apps/tebakskor/public/wp-content/plugins/wp-user-manager/vendor-dist/autoload.php(21): WPUM\ComposerAutoloaderInitb377fb3f542bb9303d4893f1901535a7::getLoader() #2 /srv/users/serverpilot/apps/tebakskor/public/wp-content/plugins/wp-user-manager/vendor-dist/scoper-autoload.php(5): require_once('/srv/users/serv...') #3 /srv/users/serverpilot/apps/tebakskor/public/wp-content/plugins/wp-user-manager/includes/class-wp-user-manager.php(197): require_once('/srv/users/serv...') #4 /srv/users/serverpilot/apps/tebakskor/public/wp-content/plugins/wp-user-manager/includes/class-wp-user-manager.php(173): WP_User_Manager->autoload() #5 /srv/users/serverpilot/apps/tebakskor/public/wp-content/plugins/wp-user-manager/includes/class-wp-user-manager.php(157): WP_User_Manager->__construct('/srv/users/serv...', '2.9') #6 /srv/users/serverpilot/apps/tebakskor/public/wp-content/plugins/wp-user-manager/wp-user-manager.php(23): WP_User_Manager::instance('/srv/users/serv...', '2.9') #7 /srv/users/serverpilot/apps/tebakskor/public/wp-content/plugins/wp-user-manager/wp-user-manager.php(26): WPUM() #8 /srv/users/serverpilot/apps/tebakskor/public/wp-settings.php(447): include_once('/srv/users/serv...') #9 /srv/users/serverpilot/apps/tebakskor/public/wp-config.php(106): require_once('/srv/users/serv...') #10 /srv/users/serverpilot/apps/tebakskor/public/wp-load.php(50): require_once('/srv/users/serv...') #11 /srv/users/serverpilot/apps/tebakskor/public/wp-blog-header.php(13): require_once('/srv/users/serv...') #12 /srv/users/serverpilot/apps/tebakskor/public/index.php(17): require('/srv/users/serv...') #13 {main} thrown in /srv/users/serverpilot/apps/tebakskor/public/wp-content/plugins/wp-user-manager/vendor-dist/composer/autoload_real.php on line 26