# UEFN live edit, the client never joins the edit session (server shuts down, "no game clients") **URL:** \ **Category:** Issues and Bug Reporting\ **Tags:** fortnite-creative, unreal-editor-for-fortnite, Status-ToDo, fortnite\ **Created:** [October 16, 2026, 6:49pm UTC](https://forums.unrealengine.com/t/uefn-live-edit-the-client-never-joins-the-edit-session-server-shuts-down-no-game-clients/2841772 "2026-10-16T18:49:37Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Wertandrew](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/wertandrew/32/916192_2.png) [@Wertandrew](https://forums.unrealengine.com/u/Wertandrew)\ **Post date:** [October 16, 2026, 6:49pm UTC](https://forums.unrealengine.com/t/uefn-live-edit-the-client-never-joins-the-edit-session-server-shuts-down-no-game-clients/2841772/1 "2026-10-16T18:49:37Z")
### Summary The client’s party moved to a new Epic party lobby **20 ms after** matchmaking had started for the edit session, and that party change cancelled the join. Nothing retried it. | UTC | Client log | | --- | --- | | 18:30:15.071 | `Setting launch data { JOIN_MM_SESSION, sessionId=cd4bb21b... }` | | 18:30:23.905 | `[Jip.Resolve] RESOLVED ... sessionId=cd4bb21b... role=Host` | | 18:30:23.909 | `MemberCoordinator:9C1C6DED...][init_succeeded]`; `ValidateJoinTarget` completed | | 18:30:23.910 | party V2:f1e35c57… readiness changed to **Ready** | | 18:30:23.931 | `LogEpicPartyLobbySync: [join_or_create] Party=[cd82bc2a...] Reason=[PartyJoined]` | | 18:30:23.941 | `Attempting to leave party [V2:f1e35c57...]` | | 18:30:23.941 | `Session changing from [cd4bb21b... EditSession] to [None ... CanNotBeJoinedOrWatched]` | | 18:30:23.941 | `ready status changed from Ready to Not Ready (CanceledIslandChanged)` | | 18:30:23.942 | `group_invalidated Reason=[local_member_became_unready]`; `ClientJoin ... Status=CanceledIslandChanged`; flow\_summary: every step after ValidateJoinTarget `Blocked` | | 18:30:24.584 | `Joined party [V2:cd82bc2a...-58430987-default]`, `Found Playable Island [playlist_vk_edit]`, but the session id stays None: no new join | Both parties hold only this account (no other player involved). It is a client-side race between the Epic party lobby migration at start-up and the `-VK.JoinEditOnLaunch` join: the party switch resets the island selection, which drops the edit session id, and the join is not resumed. Other client errors in the same second (`/DebugUI/*` “Could not find SuperStruct”, `FortniteClientPilot` async load failed, `LogJson: Json Value of type 'String' used as a 'Object'`, IAS x509 latency tests) also show on good launches and are not the cause. ## Not the cause - Not our content: upload, validation, cooking and the server’s Verse all succeeded. - Not a timeout (LF-02): the server was up and waiting for 3 min. ## Workaround Client still in the lobby \> 30 s after Launch Session: close the client, wait ~1 min (LF-10), Launch Session again. Leaving the client open in the lobby between launches (party already settled) avoids the start-up party migration. ### Please select what you are reporting on: Creative ### What Type of Bug are you experiencing? Assets ### Steps to Reproduce 1. Launch Session in UEFN. Upload went fine (“UpToDate”), the server cooked and started; the island’s Verse ran on the server (18:31:47). 2. UEFN launched a fresh Fortnite client (launcher 21:29:38). It reached the lobby with the “UEFN Session” island selected, but **never travelled to the session**. 3. At 18:34:49 the server shut down: `The server shut down because no game clients are connected` (`beacon_client_connection_closed_remotely`). ### Expected Result After `JOIN_MM_SESSION` the client joins the edit session even if its party changes during start-up (or re-applies the launch data after the party settles). Actual: a party lobby change at start-up cancels the join (`CanceledIslandChanged`) and the session dies with no clients. ### Observed Result The client’s party moved to a new Epic party lobby **20 ms after** matchmaking had started for the edit session, and that party change cancelled the join. Nothing retried it. ### Platform(s) PC ---
**Author:** ![Bug-Reporter](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/bug-reporter/32/997076_2.png) [@Bug-Reporter](https://forums.unrealengine.com/u/Bug-Reporter)\ **Post date:** [November 10, 2026, 5:00pm UTC](https://forums.unrealengine.com/t/uefn-live-edit-the-client-never-joins-the-edit-session-server-shuts-down-no-game-clients/2841772/4 "2026-11-10T17:00:49Z")
FORT-1175582 has been added to our ‘To Do’ list. Someone’s been assigned this task.