Note sure what is responsible for this behavior,
Had a typo in the action name of a controller, e.g.
hello and requesting
Argument 2 passed to Symfony\Component\HttpKernel\Event\FilterControllerEvent::__construct() must be callable, array given, called in vendor/symfony/http-kernel/HttpKern el.php on line 138
An exception with something like:
Could not find action "helloAction" in controller "Acme\HelloController"