Fatal error: Uncaught Error: Interface "MockTestInterface" not found in /var/www/html/phpkobo/research/php-downloaded-apps/phpmailer-5-2-16/PHPMailer-5.2.16/vendor/phpunit/phpunit-mock-objects/tests/_fixture/AbstractMockTestClass.php:2 Stack trace: #0 {main} thrown in /var/www/html/phpkobo/research/php-downloaded-apps/phpmailer-5-2-16/PHPMailer-5.2.16/vendor/phpunit/phpunit-mock-objects/tests/_fixture/AbstractMockTestClass.php on line 2