Fatal error: Uncaught Error: Class "Garden\Schema\Validation" not found in D:\Webserver\Apache24\htdocs\testephp\signxml\vendor\vanilla\garden-schema\tests\Fixtures\TestValidation.php:15 Stack trace: #0 {main} thrown in D:\Webserver\Apache24\htdocs\testephp\signxml\vendor\vanilla\garden-schema\tests\Fixtures\TestValidation.php on line 15