My nick turned red. The game said I'm desynchronized.
Your game got desynchronized and what you see on the screen will not be the same as what other players are seeing.
This happens in old computers that dont have the SSE2 instruction set. The only way to fix this issue is to play in a more modern computer.
If everyone in the room desynchronizes at the same time then it means that the host is to blame. In this case, try joining another room.