Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/vendor/nikic/fast-route/test/HackTypechecker/HackTypecheckerTest.php:7 Stack trace: #0 {main} thrown in /var/www/html/vendor/nikic/fast-route/test/HackTypechecker/HackTypecheckerTest.php on line 7