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