Why does Minecraft show this crash report about 'BlockEntity' when I try to log into certain servers?

Question

Why does Minecraft say this:

Server forgot to send required information to construct BlockEntity

It says this when I log into certain servers in 1.10, like Mineplex or Cubecraft.

Answer 1

I had this exact issue today with 1.10.1

Try setting your version back to 1.10, I have had no issues with that.

If you don't know how to change your minecraft version, look here: http://gamingedus.blog.ryerson.ca/educator-minecraft-resources/minecraft-how-tos/changing-your-minecraft-game-version/

Answer 2

Setting the version back, anything besides 1.10.1 that the server still supports, seems to work for me. I had the same issue with Wynncraft

Answer 3

Based on this thread in the Minecraft Forums, several people are seeing this with v 1.10.1.

One of the Minecraft devs is asking people to report this error, and even mentions that they plan to release 1.10.2 later today with a fix:

I've been told that we'll have 1.10.2 later today as well, because there is a crash happening in 1.10.1 that we didn't get in testing.

In the interim, flip back to an earlier version and you should be ok.

Answer 4

Set your version to 1.10.2.

That was a problem of forgotting to test a part of the Minecraft code on the dev side.

Bug Report Link: https://bugs.mojang.com/browse/MC-103978?jql=text%20~%20%22Server%20forgot%20to%20send%20required%20information%20to%20construct%20BlockEntity%22