That looks like the system cannot query the server. There should be a permission with query in the name that allows remote query. It should be under the guest permissions in TS3.
<@TimeX-NFo> Hey, we used to have to carry our packets to the servers.
<@TimeX-NFo> And it was upstream, both ways.
<@TimeX-NFo|away> You're asking the old dude for help?????