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