Multiplayer kick error

When i was playing hide & seek in "The Hive" as a seeker i got insta-kicked without reason, the screen only showed;

error: AAABj4xfjt4QJGVKOnw2Ro1buGSl9YUV

i did'nt get an screenshot because windows does'nt saved it. 

The screen is like dirt.png background like the common "Disconnected by Server" but with that long error.