Struggling to Join the Server

[Aden 7]

(Relevant Information: I am using vanilla version 1.17.1, and I have had access to the server before. However, I have not joined the server in a long time. My username is Hawkeye_Gough )
Every time I attempt to join the server (mc.lotc.co), I get an error message as follows:

The server you were previously on went down. You have been connected to a fallback server.

I was able to join the server once, two or three days ago. After disconnecting, I have been unable to rejoin on every attempt.
I've tried troubleshooting through restarting the game, restarting my device, waiting for things to sort out, etc. I'm afraid that I need help to figure out how to get on.

Thank you so much for looking into my issue,
Aden.

[Unwillingly 11107]

Yeah, all you need to do is use version 1.16.5 and it should be good