Fatal error: Uncaught Error: Interface "Composer\Plugin\PluginInterface" not found in /home/projetwewv/www/licence00/symfony/vendor/ocramius/package-versions/src/PackageVersions/Installer.php:32 Stack trace: #0 {main} thrown in /home/projetwewv/www/licence00/symfony/vendor/ocramius/package-versions/src/PackageVersions/Installer.php on line 32