Four servers sounds like more than it is. They are not four versions of the same room, and joining all of them is usually the wrong move.
If you play one of the mods and something is broken, go straight to that mod's server — The Long Night or Supernatural. That is where patch notes land first and where load-order problems get sorted out, usually by another player before I have even seen the message. It is the fastest help available anywhere, including email.
If you found me through a video, the Den is the one. It is the server attached to the YouTube channel: uploads, what I am building, and whatever I am currently obsessed with.
If you just want somewhere to hang out, The Game Center is the oldest room and the least on-topic one. It has been running since 2016 and it is mostly people who have known each other for years talking nonsense. The whole story is here if you want it.
If your problem is with an app, Discord is the slowest route. Use the support page instead — app problems need details like your device and version that are easier to send by email.