Thank you for this great forum software!

This issue happens in Termux running on Android and maybe the cause for this bug.

Calling the phpbb3/install it shows in the first line

[phpBB Debug] "The float -9.223372036854776E+18 is not representable as an int, cast occurred" in file /data/data/com.termux/files/www/forum/vendor/symfony/event-dispatcher/EventDispatcher.php on line 127

So the bug occured in the first line of the php script here:

        if ($listeners = $this->getListeners($eventName)) {

            $this->doDispatch($listeners, $eventName, $event);

        }

Trying to copy / migrate a running phpBB3 version 3.3.5 from a PC to an mobile device as webserver running the actual phpBB3 version 3.3.17.

The phpbb3/install/app.php/update is shown but when the button update is pressed there appears for a short time a working animation and then nothing further.

The installation process for a new database runs through.

Any ideas or tips?