Fatal error: Uncaught Error: Interface "Composer\Plugin\PluginInterface" not found in /var/www/html/demo.ininli.ca/releases/18/vendor/symfony/flex/src/Flex.php:57 Stack trace: #0 {main} thrown in /var/www/html/demo.ininli.ca/releases/18/vendor/symfony/flex/src/Flex.php on line 57