Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/firePhpSdk/vendor/lcobucci/jwt/test/unit/SignatureTest.php:14 Stack trace: #0 {main} thrown in /var/www/html/firePhpSdk/vendor/lcobucci/jwt/test/unit/SignatureTest.php on line 14