A rota não está funcionando

Olá, estou recebendo o seguinte erro quando digito localhost:8080/ola

2/2) NotFoundHttpException
No route found for "GET /ola"

in RouterListener.php line 141
at RouterListener->onKernelRequest(object(RequestEvent), 'kernel.request', object(EventDispatcher))
in EventDispatcher.php line 298
at EventDispatcher::Symfony\Component\EventDispatcher\{closure}(object(RequestEvent), 'kernel.request', object(EventDispatcher))
in EventDispatcher.php line 260
at EventDispatcher->doDispatch(array(object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure)), 'kernel.request', object(RequestEvent))
in EventDispatcher.php line 235
at EventDispatcher->callListeners(array(object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure)), 'kernel.request', object(RequestEvent))
in EventDispatcher.php line 75
at EventDispatcher->dispatch(object(RequestEvent), 'kernel.request')
in HttpKernel.php line 127
at HttpKernel->handleRaw(object(Request), 1)
in HttpKernel.php line 68
at HttpKernel->handle(object(Request), 1, true)
in Kernel.php line 198
at Kernel->handle(object(Request))
in index.php line 25

No servidor aparece o erro 404. O que pode ser?