Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/phprplacein/public_html/vendor/symfony/security-csrf/Tests/CsrfTokenManagerTest.php:23 Stack trace: #0 {main} thrown in /home/phprplacein/public_html/vendor/symfony/security-csrf/Tests/CsrfTokenManagerTest.php on line 23