Fatal error: Uncaught Error: Class 'Composer\Installer\LibraryInstaller' not found in /home/eberhardschwarze/public_html/vendor/contao-community-alliance/composer-plugin/src/Installer/AbstractModuleInstaller.php:40 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/contao-community-alliance/composer-plugin/src/Installer/AbstractModuleInstaller.php on line 40