Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/flighto/e-commerce/vendor/phrity/util-errorhandler/tests/ErrorHandlerTest.php:20 Stack trace: #0 {main} thrown in /home/flighto/e-commerce/vendor/phrity/util-errorhandler/tests/ErrorHandlerTest.php on line 20