Vimbadmin doesn't work anymore?

Hey,

on multiple machines i’m seeing the same error vor vimbadmin.

> Parse error: syntax error, unexpected '?' in /var/www/22222/htdocs/vimbadmin/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/Mysqli/MysqliConnection.php on line 293

Is this a known issue? Is there fix for that?

@Helmi, did you see my solution?