Edit File: FactoryRuntimeLoader.php
<?php use Twig\RuntimeLoader\FactoryRuntimeLoader; class_exists('Twig\RuntimeLoader\FactoryRuntimeLoader'); @trigger_error(sprintf('Using the "Twig_FactoryRuntimeLoader" class is deprecated since Twig version 2.7, use "Twig\RuntimeLoader\FactoryRuntimeLoader" instead.'), E_USER_DEPRECATED); if (\false) { /** @deprecated since Twig 2.7, use "Twig\RuntimeLoader\FactoryRuntimeLoader" instead */ class Twig_FactoryRuntimeLoader extends FactoryRuntimeLoader { } }