Fatal error: Declaration of PrestaShopBundle\PrestaShopBundle::getContainerExtension() must be compatible with Symfony\Component\HttpKernel\Bundle\Bundle::getContainerExtension(): ?Symfony\Component\DependencyInjection\Extension\ExtensionInterface in /www/htdocs/w021807d/hitozon.com/src/PrestaShopBundle/PrestaShopBundle.php on line 51