I dont think it will be called doxxing then since it is with their consent and they accept it. But it says in Minehut rules that any type of information regardeless of the situation is not allowed!
Usually easy fix. Just launch normal Minecraft. You don't need to contanct support. If that doesn't work go to File Manager -> logs -> latest.logs and then check for errors.
If you use the plugin citizens the command you need to do is.
look at the npc and do /npc select
and now do, /npc cmd add server lobby
I think thats how you add a command. Also if you want to switch beetween server do /server ServerName