Fatal error: Uncaught Error: Class 'Composer\Installer\LibraryInstaller' not found in /home/www/farandole/vendor/composer/installers/src/Composer/Installers/Installer.php:9 Stack trace: #0 {main} thrown in /home/www/farandole/vendor/composer/installers/src/Composer/Installers/Installer.php on line 9