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