For me its still empty line, its not problem with server.
This page
https://hd2.mtb-clan.com/
is displaying server info like it should and I guess it queris this info same way.
This tells me that problem must be in program...
In-game server info also shows correct info but this doesnt count because this info is collected differently, it shows much more, like: difficulty, Lives, RoundLimit/count, inverse damage...