Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /home/app/htdocs/message_gateway_20231016/vendor/myclabs/deep-copy/tests/DeepCopyTest/DeepCopyTest.php:33 Stack trace: #0 {main} thrown in /home/app/htdocs/message_gateway_20231016/vendor/myclabs/deep-copy/tests/DeepCopyTest/DeepCopyTest.php on line 33