Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\fiveplus\nfe\vendor\tecnickcom\tc-lib-color\test\TestUtil.php:32 Stack trace: #0 {main} thrown in C:\xampp\htdocs\fiveplus\nfe\vendor\tecnickcom\tc-lib-color\test\TestUtil.php on line 32