Hi. According to the log, it looks like Steam has failed to initialize when starting the game. Make sure you're not in offline mode and that steam is logged in and running.

InvalidOperationException: Steamworks is not initialized.

Thanks for the report. We're seeing some error logs come in around this room. We'll take a look!

Cheers guys. We agree and will get this resolved shortly.

As of hotfix v1.4.0f6 this should be solved.