Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\ApiSigestWin\1.0\vendor\symfony\browser-kit\Tests\AbstractBrowserTest.php:20 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ApiSigestWin\1.0\vendor\symfony\browser-kit\Tests\AbstractBrowserTest.php on line 20