Server crashing

I wanted to join a public server called Mineplex. I couldn't, though I only seemed to get this crash from that server, though it says it's not a server crash.
What I expected to happen was....
I wanted to join a public server.

What actually happened was...:
I tried to join it, but it crashes each time. The error message claims "Server forgot to send required information to construct BlockEntity"
Steps to Reproduce:
1. Go to servers list
2.Join server
3.Crash