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