Fatal error: Uncaught Error: Interface 'Composer\Plugin\PluginInterface' not found in /var/www/legtux.org/users/weboconsulting/www/vendor/symfony/flex/src/Flex.php:61 Stack trace: #0 {main} thrown in /var/www/legtux.org/users/weboconsulting/www/vendor/symfony/flex/src/Flex.php on line 61