Hey bud, have u tried checking the output log to see if theres anything u can see there that might be crashing the game. does it crash or does it send u back to the main menu, a couple of my buddies have this issue, through server console it says its steam side. Although u play solo technically i believe u create a server where u can still invite buddies and such.
2021-06-05T07:55:39 94917.562 INF [Steamworks.NET] Authentication callback. ID: , owner: , result: k_EAuthSessionResponseAuthTicketCanceled
2021-06-05T07:55:39 94917.563 INF [Steamworks.NET] Kick player for invalid login:
2021-06-05T07:55:39 94917.563 INF [Auth] Steam authorization failed: EntityID=5576, PlayerID