Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\Apache24_x64\htdocs\ipad\vendor\symfony\console\Tests\Helper\ProcessHelperTest.php:21 Stack trace: #0 {main} thrown in C:\Apache24_x64\htdocs\ipad\vendor\symfony\console\Tests\Helper\ProcessHelperTest.php on line 21