Twig addExtension Uncaught Twig\Error\RuntimeError

Hi,

Maybe I'm doing something wrong, but I can't tell from the description. I add the time extension to Twig, but then I get an Uncaught Twig\Error\RuntimeError error.

$twig->addExtension(new \Knp\Bundle\TimeBundle\Twig\Extension\TimeExtension());

Uncaught Twig\Error\RuntimeError: Unable to load the "Knp\Bundle\TimeBundle\DateTimeFormatter" runtime in "__string_template_

Start by reproducing the reported addExtension call with Knp\Bundle\TimeBundle\Twig\Extension\TimeExtension and inspect the attempted loading of Knp\Bundle\TimeBundle\DateTimeFormatter. Confirm whether the runtime error is caused by the documented setup or an incompatibility, and make the extension load successfully without the reported RuntimeError.

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