That last logfile does not contain a streaming attempt.
Do be aware that Twitch has been having issues for the last few days with streams not showing as live, on and off.
From your second logfile,
20:37:13.089: RTMPSockBuf_Fill, remote host closed connection
20:37:13.090: [rtmp stream: 'adv_stream'] Connection to rtmp://dfw.contribute.live-video.net/app failed: -3
This appears to be an issue with your network connection to the ingest server timing out. This isn't something OBS can fix or affect.
Recommend running R1ch's TwitchTest application, and using a server with a Quality score of 100 if possible, down to 90 if no 100 are available.
The "fun" part about the internet is that 95% of your connection to any server is entirely out of your control. This means that your connection can go from great to awful (and back) without you changing anything at all.