Ubuntu 24.04 with Apache
I get this error trying to upgrade from OJS 3.2 to OJS 3.4 when running: php tools/upgrade.php upgrade
PHP Fatal error: Uncaught Exception: Mailer driver isn’t specified in the application’s config in /home/webs/newrsel/lib/pkp/classes/core/PKPContainer.php:324
The config.inc.php file is exactly the same file I was using in OJS 3.2 which is working perfectly, file which have the Mailer specified.