Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\astra-backoffice\vendor\phar-io\version\tests\Unit\ExactVersionConstraintTest.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\astra-backoffice\vendor\phar-io\version\tests\Unit\ExactVersionConstraintTest.php on line 17