Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\www\Apache24\htdocs\Proyecto_360\vendor\symfony\mailer\Test\AbstractTransportFactoryTestCase.php:21 Stack trace: #0 {main} thrown in C:\www\Apache24\htdocs\Proyecto_360\vendor\symfony\mailer\Test\AbstractTransportFactoryTestCase.php on line 21