Fatal error: Uncaught Error: Function name must be a string in /var/www/guesttoguest/module/Application/Module.php:431 Stack trace: #0 [internal function]: Application\Module->onBootstrap(Object(Zend\Mvc\MvcEvent)) #1 /var/www/guesttoguest/vendor/zendframework/zendframework/library/Zend/EventManager/EventManager.php(444): call_user_func(Array, Object(Zend\Mvc\MvcEvent)) #2 /var/www/guesttoguest/vendor/zendframework/zendframework/library/Zend/EventManager/EventManager.php(205): Zend\EventManager\EventManager->triggerListeners('bootstrap', Object(Zend\Mvc\MvcEvent), Array) #3 /var/www/guesttoguest/vendor/zendframework/zendframework/library/Zend/Mvc/Application.php(157): Zend\EventManager\EventManager->trigger('bootstrap', Object(Zend\Mvc\MvcEvent)) #4 /var/www/guesttoguest/vendor/zendframework/zendframework/library/Zend/Mvc/Application.php(261): Zend\Mvc\Application->bootstrap(Array) #5 /var/www/guesttoguest/public/index.php(25): Zend\Mvc\Application::init(Array) #6 {main} thrown in /var/www/guesttoguest/module/Application/Module.php on line 431