We recently updated our map with a new content update and are experiencing many players unable to matchmake. All players unable to matchmake are on PS4, Switch or Xbox One devices.
Every player unable to matchmake receives a range of errors each time they matchmake, with all errors being shared across players including:
FailedToConnect
Network Connection Lost
Client failed to registed with server
After failing to matchmake, often players matchmaking UI will change to be a very old version of the matchmaking UI (see images), and players cannot interact from this point.
Account IDs that were affected by this include:
7950e05631214388af64d776154fe570
d162c7d2c73344998d168b319db480a0
36787b34e9e44c37bf0132b66db35a11
dd1d12142d7f48b0a940d0de0237231d
6d2d1e7a58ba4036982973dac2b65530
c54e87d85b4b4513af8b9757dd6b4190
Matchmaking failures on these accounts occured between 8pm and 11pm EDT on Tuesday September 16, 2025.
Are you able to please advise us on the reason for these matchmaking failures so we can attempt to address? We have a large community attempting to play the new update and it’s frustrating being unable to debug this matchmaking issue.
Please select what you are reporting on:
Unreal Editor for Fortnite
What Type of Bug are you experiencing?
Matchmaking
Steps to Reproduce
Load into mapcode 3469-7377-0976 on PS4, Switch or Xbox One device.
Hey, i’m working on the same project as Zebs (Above)
We’ve been blocked on last-gen consoles (Switch, PS4, Xbox One) since July 20, 2025, when there was an outage with the cook system (valkyrie-cook-api).
Our project worked fine up to revision 2748, but from 2749 (July 20 - 9:35am) onwards it has never worked on last-gen consoles (though PC still works).
Out-of-order slow task construction/destruction: destroying 'Matchmaking ...' but 'Uploading Assets' is at the top of the stack
LogValkyrie: Error: FlowStep_ResolveSessionCandidates(): Candidate module [562929a6-493e-2b6d-91eb-ceb08b29db50] failed validation with error: [http_error_500: valkyrie-cook-api.prod.ucs.on.epicgames.com]
Even publishing an empty scene still fails on last-gen consoles with the same error.
What we’ve tested
Deleted Verse, SceneGraph, Data Layers, Icehook content, shaders, heavy VFX.
Reduced project size & actors.
Last working build (rev 2748) → same projectId + same moduleId.
Since the July 20 cook outage, all syncs bind to the same module ID (562929a6-493e-2b6d-91eb-ceb08b29db50) which now fails validation only on last-gen.
Request
Could you please:
Investigate whether module 562929a6-493e-2b6d-91eb-ceb08b29db50 was corrupted during the July 20 cook outage?
Invalidate/recook or reset this module binding for our project (projectId: 59d327d9-47d0-37c8-1747-5ab22f2b9c94) so it can target last-gen again.
Confirm if there is a known issue with the URC update + candidate module validation on last-gen.
This issue has blocked us for months, and since it reproduces even on empty maps, it looks like a backend module validation problem rather than our content.
Same happened with a new map ive launched recently, players are reporting not being able to matchmake,
I saw someone saying it has something to do with material changing inside the game, but if it happens on empty islands it seems to not make sense, happened for another map ive launched recently, players reporting the same issue.
the map has been getting the error from launch, same issue as above:
6853-0054-1181
with the images matchmaking UI change to be a very old version of the matchmaking UI and players cannot interact from this point.
