Found the problem, it's a game bug.
Please try deleting the file config.xml, it's in the same folder as the output.log (C:/users/your_user/appdata/locallow/junkbytes/stick veterans). Then restart the game, and it will be auto-generated again.
Also, in the Game Rules, make sure the "extra grenade for every..." is not zero. This will be allowed in the next update, where I will include the fix.
Thanks for reporting the problem, and let me know if it persists!