Evenement\EventEmitter::on() must be callable
Hi. I have got problem during making Ratchet tutorial. This is my full error log.

PHP Catchable fatal error:  Argument 2 passed to Evenement\EventEmitter::on() must be callable, array given, called in /var/www/ratchet/bin/push-server.php on line 12 and defined in /var/www/ratchet/vendor/evenement/evenement/src/Evenement/EventEmitterTrait.php on line 18

I found that if you delete callable attribute before $listener param from EventEmitterInterface then works fine. You should update yours tutorial to new version of Evenement or add specific version to composer.lock.

Best regards.
