Hey guys! I'm new to the forums and the server. I've been building some stuff in the dark oak forest overlooking the christmas zone. Loserific and I are working together to submit a design for the contest.

But yesterday and today when I try to log in it just says I cannot connect to the server. It's not my internet connection. I keep restarting and checking and it just wont let me in.
I think it's saying "outdated server"

Is this because I'm updated to 1.11.2?
How can i set it back?