So, I've been having trouble joining the server with Update 47, so I thought I'd try Joining with Update 48 instead, and it worked except that it kicked me because the server isn't up-to-date yet. I tried re-downloading Update 47, but It's still getting stuck at the log-in screen.

If I let it sit long enough, though it times out.

I also just tried joining the Beta and Creative servers, and it logs in just fine there, except that I don't have permission

You have the tardis bug which means staff has to tp you away from that tardis.

So, if I log-off in my own TARDIS, then I can't log back in?

Indeed. It's a bug that happens to some people with an old forge version.  It's best to join the discord and ask for someone to teleport you in #support
Then you can join again.

And if I don't have Discord? I could try maybe updating forge, or taking out some mods that I use for survival.

Try updating forge but its not a problem with other mods so you can keep those mods (So long it isn't a hack mod like X-ray).

You'd probably still need a tp. If it doesn't work, you can join the discord. It's on our homepage. 

Yeah, I still need the Tp, but I don't have a Discord account.

Mostly it's mods like jei, or Agricraft.

Could I join with an Alt, to request a tp to spawn for my main?

My in-game name is Tacoman12212002

For the most part, I can get on at any time, I just need to know when you're on.

I'm logging in

Solved, thnx everyone!