Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/mpw/vendor/lcobucci/jwt/test/unit/Signer/EcdsaTest.php:21 Stack trace: #0 {main} thrown in /var/www/html/mpw/vendor/lcobucci/jwt/test/unit/Signer/EcdsaTest.php on line 21