Fatal error: Uncaught Error: Class "Composer\Installer\LibraryInstaller" not found in /home/rankting/public_html/ALT/ranketing.de (contao)/vendor/contao-community-alliance/composer-plugin/src/Installer/AbstractModuleInstaller.php:42 Stack trace: #0 {main} thrown in /home/rankting/public_html/ALT/ranketing.de (contao)/vendor/contao-community-alliance/composer-plugin/src/Installer/AbstractModuleInstaller.php on line 42