connection issues

Hello, the usual answer to this question is that the server is down or sth, I'm getting this message after wanting to tp to bag end, pls help. I have no trouble joining other servers.

Hi all - I'm a new player looking to explore the server. I joined and went through the quiz with no issues. I then walked forward until teleported to Bag End, where I explored for 5 minutes or so, with occasional Timing Out. I then tried to rejoin while running 1.16.5 (I was running 1.17.1) to...