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