Fatal error: Uncaught Error: Class 'Composer\Installer\LibraryInstaller' not found in /var/www/alldocs/home/sdoehner/webtest/simplesamlphp_idp/vendor/simplesamlphp/composer-module-installer/src/SimpleSamlPhp/Composer/ModuleInstaller.php:8 Stack trace: #0 {main} thrown in /var/www/alldocs/home/sdoehner/webtest/simplesamlphp_idp/vendor/simplesamlphp/composer-module-installer/src/SimpleSamlPhp/Composer/ModuleInstaller.php on line 8