Hey there --
Are there any other logs in the PlayerData folder? It sounds like there is a crash happening, but it might be on a different thread and thus not logging to the main output log. If that doesn't work, then can you show us what the settings are you have for the start game screen? You might have some setting as blank, or a map seed specifically set, that is causing the issue and that we can reproduce.
Last note, if you can make these additions on mantis (see my sig), that would be appreciated.
Thank you!!