danger

Good day. I have such a problem, after loading, the connection with the server disappears, I look at the ping, passes 4 packages, and then silence. I tried to put it as a new one, I also tried to update from the menu, it did not help. He put both on a real PC and on a virtual machine, the problem is the same everywhere. Moreover, the problem began with 1.1b1 and also, the most on 1.1b2, on version 1.0.b13 this is not. Who has come across this, tell me what can be done.