Live Edit session drops ~5 minutes after launch, client never joins the island

Summary

Launch Session (Live Edit) starts normally: the project validates, uploads, and a Fortnite client opens.
The game server comes up and reaches PreGame. The client, however, stays in the Fortnite front-end menu
and never travels to the island. About 3.5 minutes after the server reached PreGame, the server shuts
itself down with “The server shut down because no game clients are connected.” and the editor drops
the session (“Session Disconnected”).

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Live Edit

Steps to Reproduce

  1. Open the project in UEFN.
  2. Click Launch Session.
  3. Wait at the Fortnite client’s front-end without doing anything.
  4. After ~5 minutes the editor toolbar shows Session Disconnected; the client is still in the menu.

Expected Result

After the server reaches PreGame, the client is sent to the island and the match can start.

Observed Result

The editor’s content step for the client never completes; the client is never sent to the island, and the server times out for having no players.

Platform(s)

PC

Additional Notes

Time Where Event
17:52:25 Editor Play flow starts (Flow Guid 3BD8C1F44A2DB1B6274CCA8AB7E69F00), upload begins
17:52:28 Editor Local validation runs and passes
17:52:37 Client Fortnite client launched (log opens 17:52:42)
17:52:43 Editor Upload UpToDate; Session -> Complete Activity: DistributingToConnectedSession
17:52:43 Editor Session -> Start Activity: LoadingNewContent - Cooking for client and server platforms
17:52:53 Client LoadMap: /Game/Maps/Frontend (the only map the client ever loads)
17:54:03 Editor Beacon: MinigameStateChanged: EFortMinigameState::PreGame (server is up)
17:54:05 Editor Cooking for server platforms finished, waiting on client platforms...
17:54-17:57 Both No further session activity; the client makes no join / travel attempt
17:57:41 Editor Beacon closed remotely (beacon_client_connection_closed_remotely, ControlChannelClose)
17:57:41 Editor OnValkyrieBeaconNotifiedOfServerShutdown - game server was shutdown. Reason: The server shut down because no game clients are connected.
17:57:41 Editor HandleServerConnectionLost; PlayFlow=315.605 s
18:04:34 Editor Epic Connect drops: EOS_EpicConnect_TokenIsNoLongerValid, reconnects and resubscribes by 18:04:36