PSR Issue?

gistfile1.txt

    RuntimeException in ControllerResolver.php line 122: Controller "Application\Controller\Index::talkAction()" requires that you provide a value for the "$request" argument (because there is no default value or because there is a non optional argument after this one).

    in ControllerResolver.php line 122
    at ControllerResolver->doGetArguments(object(Request), array(object(Index), 'talkAction'), array(object(ReflectionParameter))) in ControllerResolver.php line 99
    at ControllerResolver->getArguments(object(Request), array(object(Index), 'talkAction')) in App.php line 294
    at App->dispatch(object(Request), object(Response)) in App.php line 262
    at App->run() in index.php line 31