Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/rt66ugcom/public_html/admin/vendor/psy/psysh/test/ShellTest.php:21 Stack trace: #0 {main} thrown in /home/rt66ugcom/public_html/admin/vendor/psy/psysh/test/ShellTest.php on line 21