Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in D:\xampp\htdocs\erp_api\vendor\symfony\process\Symfony\Component\Process\Tests\ProcessUtilsTest.php:16 Stack trace: #0 {main} thrown in D:\xampp\htdocs\erp_api\vendor\symfony\process\Symfony\Component\Process\Tests\ProcessUtilsTest.php on line 16