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