Fatal error: Uncaught Error: Interface 'PHPUnit\Framework\SelfDescribing' not found in /var/www/html/login-server/vendor/phpunit/phpunit-mock-objects/src/Stub.php:20 Stack trace: #0 {main} thrown in /var/www/html/login-server/vendor/phpunit/phpunit-mock-objects/src/Stub.php on line 20