At long last, 1.12 is finally upon us. This update brings in a variety of new content that will be sure to spice your desires and tickle your fancy. Among the changes include newly added parrots (don't feed them chocolate!!!), concrete blocks, a knowledge (recipe) book, colorful beds, and my personal favorite, a narrator that will read chat aloud to you when you press CTRL+B. How cool and useless is that?!?! If you'd like to see a complete list of new features, changes, and bug fixes introduced in this update, click here. Expect 1.12 to drop into MCS in 1.5 to 2 weeks. Until then... Play single player, pick your nose, roll down a hill, pretend to be a crumb on your kitchen floor, climb a mountain, eat pineapple... Do whatever you'd like that will be sure to distract yourself enough to patiently wait for our server to update. If you wish to continue playing on our server, do not update your game client, or switch to the 1.11.2 client by using a different launch profile. If you're not sure how to do that, click here. As always, happy crafting! -Fill
You've probably updated your minecraft to 1.12 but the server is still on 1.11.2 you gotta open minecraft and change the launch options so it's 1.11.2 and then it should work.