Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in C:\xampp\htdocs\print\vendor\lcobucci\jwt\test\unit\ValidationDataTest.php:14 Stack trace: #0 {main} thrown in C:\xampp\htdocs\print\vendor\lcobucci\jwt\test\unit\ValidationDataTest.php on line 14