1. no log visible. follow process for attaching log to post in the pinned post in this forum (link in my .sig)
2. Did you set up Facebook correctly? if your answer is, 'well you've streamed before so it must be right'... no. not even close
beware there is browser/device camera default for streaming, then an alternate setting to instead use Streaming Software (stream key... ie OBS and others) setup for stream input. Have you confirmed in Facebook's /live/Producer your settings are appropriate?
Best Practice (rarely followed) is to use a unique stream key for each stream (ie NOT use a Persistent Key = bad security)
*IF* advance scheduling works, then at one time (not sure if still true, suspect it might be), if you Schedule for live video event, you can actually get a consistent URL usage for non-Facebook users (can't comment, but can watch no problem without logging in)
