Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/live/demo8.thesynergate.com/sms_api_v2/vendor/symfony/mailer/Test/TransportFactoryTestCase.php:29 Stack trace: #0 {main} thrown in /var/www/live/demo8.thesynergate.com/sms_api_v2/vendor/symfony/mailer/Test/TransportFactoryTestCase.php on line 29