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