(I'm sorry for bad English, I'm not native speaker)

I have a server. And I can log in. But my friend can't. His window freezes, but he can to click "cancel".

![enter image description here][1]
  [1]: https://i.sstatic.net/ZQ1i1.jpg


That's what I see in my console:

![enter image description here][2]
  [2]: https://i.sstatic.net/VaUMJ.png


So... **What shall we do to fix it?**