Fatal error: Uncaught Error: Class "Symfony\Contracts\Service\Test\ServiceLocatorTestCase" not found in C:\xampp\htdocs\tienda\vendor\symfony\service-contracts\Test\ServiceLocatorTest.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\tienda\vendor\symfony\service-contracts\Test\ServiceLocatorTest.php on line 17