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