One day we played as a trio — me, John, and Mate — on my dedicated server (from steam library tool) with no problems. The following day, Mate couldn’t join. We tried everything to fix it, but nothing worked. Then I sent the map to John so he could launch the server, and luckily we were able to join again.
However, the next day the problem returned — now I cannot join John's server. The screen either keeps loading infinitely or sends me back to the main menu, or sometimes even shuts down the game.
Error shown in John server CMD:
2026.04.27-17.22.00:305][128]LogNet: Error: UEngine::BroadcastNetworkFailure: FailureType = ConnectionLost, ErrorString = UIpNetConnection::HandleSocketSendResult: Socket->SendTo failed with error 33 (SE_ECONNREFUSED). [UNetConnection] RemoteAddr: R5:8fb9cfff974943489f0b1ce9e8d5fa2c:, Name: IpConnection_2147403115, Driver: Name:GameNetDriver Def:GameNetDriver R5NetDriver_2147480917, IsServer: YES, PC: NULL, Owner: NULL, UniqueId: NULL:DESKTOP-BD5RGGB-BD16297141D91E13A37DE38D5AD3EF34 Connection will be closed during next Tick()!, Driver = Name:GameNetDriver Def:GameNetDriver R5NetDriver_2147480917