Hello Phil,
From the look of the help request you've send in (I'll be sure to also send this mail as a reply on that one, so I can be sure you'll see the reply) you're using the wrong source:
I can find the following error in your Config log: "File not found: //localhost"
A stream source should either be the IP or the file you wish to stream. In your case you're using OBS to stream: Which means your source should be the machine running OBS. If this is the same machine you should use "push://localhost" as source (if it's another machine check your router for IP information). The push:// part makes sure MistServer will understand you're going to push a stream from the following ip. if you forget it, it'll expect a file at the locations //localhost, which probably won't exist.
As for your OBS, you'll need to make sure it pushes to the machine running mistserver (again probably localhost, but if it's another machine check your router for iP information). through RTMP (port 1935 or another port if you changed the RMTP port) with your stream name as Streamkey or Streamname depending on how they'll call it. If there's no streamkey/streamname option you should use the following address: "rtmp://localhost:1935/live/streamname" (change the streamname to the streamname you use within MIstServer). It looks like you've named your stream doja so it should be "rtmp://localhost:1935/live/doja" or "rtmp://localhost:1935/live/" with streamkey/name "doja".
Of course you should also check if your protocols are running without problem, simply going to the protocol page to see if they're available and the logs page to see if there's any warnings about your protocols should be enough to check whether they're running.
If you still run into any problems you can also try our Live streaming guide, we'll update all our guides to be a bit more easy to use in the near future, but it should be understandable enough: http://mistserver.org/wiki/Push_Guide