[zachmorris]

This is a confusing log.  It looks like you're using an NVidia Shield, not LibrEelec (or LibreElec Remix).  So settings wise, you would follow instructions for Android if you were trying to externally launch the game.

However, you're trying to use retroplayer.  Bear with me (and Garbear) since v18 is still in alpha.  Some things aren't 100% both in Kodi and in IARL.

I would just ensure all game lists are setup for Retroplayer by:

• Go to the Setup Wizard tab in settings
  
• Choose Retroplayer
  
• Hit Run Wizard
  

That will set all game lists to use Retroplayer.  I will clarify that in the wiki as it's not 100% clear.  Eventually, that won't even be needed and it 'will just work'.  But for now, it's best to do this.

I don't have an android machine and I'm not sure how well Retroplayer is working for that at this point, however like you said it looks like thats not the problem anyway.

The game you're trying to download fails for some reason.  I tried the same exact game with the same download settings you have in the log and it works like a charm.  I'm guessing that the Kodi Alpha version is mucking it up somehow, although I'd be interested in how.  Can you navigate to this file on the machine and see if it's empty, or if you can manually unzip it?  From the log I can't tell if it doesn't download properly, or if unzip is failing for some unknown reason.  In v17 Kodi this works on two different OS's I've tried.

Finally, you could try and add login credentials into IARL.  I doubt that will fix it, but you could always try.  Although last time I checked the settings system for the Kodi Alpha's wasn't working correctly, and I was told it's best to wait it out.  If you can add login credentials in settings, you can see if that makes a difference - hopefully it doesn't.