I see a couple things happening here:
 You're running multiple instances of OBS. If both are trying to stream to the same endpoint, (ie: you were streaming to one, OBS looked like it crashed, but was still running in the background, and you started another instance and started streaming again), you're gonna have issues.
 You're using wifi. Stop that. - Seriously though, you should never stream on a wireless connection, way too many things that can cause instability in your connection. In fact, that instability can be detected by the server end, and lead to....
 Your OBS appears to be receiving an 'fd_close' - this is typically from the server end shutting down the connection / closing it, which can happen if, as I mentioned in the 2nd item, the server detects that connection quality is incredibly unstable.
I can't stress enough how much you should *not* be using the wireless connection to stream. That said, if you have no other choice (ie: you have no ethernet adapter), I'd start by updating your wireless card's drivers and see if that helps the issue.