Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/clademy/lms.clademy.com/vendor/google/cloud-core/src/Testing/System/SystemTestCase.php:36 Stack trace: #0 {main} thrown in /home/clademy/lms.clademy.com/vendor/google/cloud-core/src/Testing/System/SystemTestCase.php on line 36