Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\ApiSigestWin\1.0\vendor\twig\extensions\test\Twig\Tests\Grammar\OptionalTest.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ApiSigestWin\1.0\vendor\twig\extensions\test\Twig\Tests\Grammar\OptionalTest.php on line 12