Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\soli\vendor\spomky-labs\pki-framework\tests\X509\Integration\AcmeAc\Extension\RefACExtTestHelper.php:11 Stack trace: #0 C:\xampp\htdocs\soli\vendor\spomky-labs\pki-framework\tests\X509\Integration\AcmeAc\Extension\TargetInformationExtensionDecodeTest.php(13): require_once() #1 {main} thrown in C:\xampp\htdocs\soli\vendor\spomky-labs\pki-framework\tests\X509\Integration\AcmeAc\Extension\RefACExtTestHelper.php on line 11