[BLOCKER] Can't launch session, module validation failed

Summary

When I try to launch session after the latest update (36.20) on this project it keeps giving an error “Failed to validate module candidate versions”. I tried to delete some of the assets that show up in the output log error but that didn’t change the error. I can’t launch session at all.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Assets

Steps to Reproduce

Launch session in this project

Expected Result

Session is launched

Observed Result

Getting validation error

Platform(s)

windows

Upload an image

UPDATE: Removing all the assets showing in the error log and their references let us launch session, but we still don’t know why those assets were a problem and removing them isnt really a long term solution.

I have the same problems! Great last update :frowning:

hi @Gurkis , @MagicThor

You will need to run [Validation Fixer as described in]
(Validation and Fix-Up Tool in Unreal Editor for Fortnite | Fortnite Documentation | Epic Developer Community}

2 Likes

Hi @Jimbohalo10 , big thanks!
But I have a problem with Referenced Content via Fab integration; there is no way I can fix, in my case…

This is the errors i’m receiving when trying to launch a test session

image



@Gurkis is this still happening? Could we get your logs?

FORT-937479 changed to ‘Needs More Info’. We’re missing information that would help us determine the source of the issue.

Yes, I Zipped the whole folder.
Logs.zip (14.3 MB)

I’d also like to add that I have tried a lot to get around this. There are no errors listed in message log, only output log. Editor Loads Project in Slow. Cannot Launch a Session. Ended up Reverting Back to Older Snapshot so I could make an update, but cannot build new hlods so progress is really at a hault. Everything was fine until a couple weeks ago. Fixing Redirectors helped a ton with load in time for UEFN Editor, so that is a plus.

  1. Deleted Hlods, Replaced Hlods References. Every time it appears to work, but when I went into the project folder on my D: Drive, the old hlod ueassets were still listed there. I did “Fixed Redirectors” by right clicking the project content folder in uefn and it removed them. Loads in Much Faster. Still Get Issue with Error when Trying to Launch..
  2. Re-Validated UEFN and Fortnite, Ran in Administrator and without Administrator.
  3. Deleted project from computer and synced it back using Revision Control.
  4. Reverted to Older Snapshot

I’ve been having this issue this week too.

In my session its related to a material instance of the Custom Creative landscape and adding it to custom meshes. It also might be related to their use with data layers. This is a consistent repeating bug. I rolled back to leave this bug behind but it came back on the same assets when messing with data layers.

Also note this asset was created with modeling mode and not an import.

Before this update these static mesh assets were stable for 4 months.