I recommend you look at your Log link above and note the audio source error, as well as the 2 different sampling rates (strongly recommended against)
21:39:27.904: [rtmp stream: 'simple_stream'] Connecting to RTMP URL rtmps://rtmp-api.facebook.com:443/rtmp/...
21:39:27.905: [rtmp stream: 'simple_stream'] Binding to IPv4
21:39:28.019: RTMP_Connect0, failed to bind socket: The requested address is not valid in its context. (10049)
21:39:28.020: [rtmp stream: 'simple_stream'] Connection to rtmps://rtmp-api.facebook.com:443/rtmp/ failed: -2
would indicate to me either a network DNS issue, a firewall/network filter, or something on your PC?? that isn't an OBS issue
Did you log onto FB's /live/producer to get your stream key, and still have that web page open when you get that error?
Do you have security software installed on your PC that is configured to block this real time message protocol (RTMP) traffic?