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