Can't Do Anything.

Alright, so I come back to play this after a few months, and I have a problem before I event start playing.

So whenever I connect to the lobby, I do the usually 'Find a world'
I clicked on 24 as I was typing this, and it occurs once again.
As soon as it finishes downloading terrain, I see a flash of the spawn room. Then everything starts going up. I am constantly falling through the spawn point and just get stuck going down with no commands besides /lobby to get me going back.
I have tried disconnecting and reconnecting, I have restarted the game, I have gone to almost every world at this point, and I have waited in one world to see if it would put me back up there, and to no avail.
I don't know if I should give up on playing this, or what may help with this issue, but I'd like to revisit this.

 

You tryed /kill?

 

We use textpacks now so enable tp on server edit.