Windows - C:\Users\username\AppData\LocalLow\Berserk Games\Tabletop Simulator\Player.log.To enable logging, type /log in chat or add -log to your launch options. UDP (outbound) - 3478, 4379, 4380 (Steam P2P Ports) Enable Logging ¶ These should always be the first things you try when running into issues with a Steam game.
You can search for a solution there and, if none is available, post your problem there. Your next stop should be the Official Forums.