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