Thanks for sharing the file, there doesn't appear to be anything TOO wrong with that log you sent me - if you played the game for a second time after you had the issue, the log information would have been moved to 'Player-prev.log' file, located in the same file directory as before, and while you're at it, could you send me your 'slot0.json' file? Might make this quicker.
I do want to make it clear that: If you play the game again, the player-prev.log file will be overwritten with your newer logs, meaning i can't diagnose the issue, unless the error happens again and we get the logs for when it happens.
I might implement a 'debug bundle' button to make bug-reporting easier via .zip or .txt in the next version.