Fatal error: Uncaught Error: Interface "Tester\Runner\OutputHandler" not found in /var/www/html/smtp/vendor/nette/tester/src/Runner/Output/ConsolePrinter.php:21 Stack trace: #0 {main} thrown in /var/www/html/smtp/vendor/nette/tester/src/Runner/Output/ConsolePrinter.php on line 21