Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/live/demo5.thesynergate.com/landchase_api/vendor/league/oauth1-client/tests/RsaClientCredentialsTest.php:10 Stack trace: #0 {main} thrown in /var/www/live/demo5.thesynergate.com/landchase_api/vendor/league/oauth1-client/tests/RsaClientCredentialsTest.php on line 10