Fatal error: Uncaught Error: Interface 'Symfony\Component\DependencyInjection\Argument\ArgumentInterface' not found in /home/devmecseminars/public_html/mec/vendor/symfony/dependency-injection/Argument/IteratorArgument.php:19
Stack trace:
#0 {main}
thrown in /home/devmecseminars/public_html/mec/vendor/symfony/dependency-injection/Argument/IteratorArgument.php on line 19