Summary
Hello,
I am contacting you regarding an issue I am experiencing in UEFN with the Fab pack “Paris - Fontaine Saint-Michel.”
After adding the UEFN (Paris - Fontaine Saint-Michel) version of the pack to my project, everything works normally while editing. However, when I try to launch a Playtest Session, project validation fails, which makes the pack unusable in my project because I cannot launch the Playtest Session.
The issue appears to be directly related to the use of this pack, because when I remove it from the project, the Playtest Session launches normally again.
I would therefore like to know if you could investigate this issue at the pack, dependency, or Epic/Fab backend service level in order to find a solution.
Thank you in advance for your help.
Please select what you are reporting on:
Unreal Editor for Fortnite
What Type of Bug are you experiencing?
Assets
Steps to Reproduce
Add the “Paris - Fontaine Saint-Michel” pack to a UEFN project from Fab.
Place several assets from the pack in the level.
Continue working normally on the project for a while.
Attempt to launch a Playtest Session in In-Editor / Live Edit mode.
Project validation fails during the synchronization phase, preventing the Playtest Session from launching.
Removing the “Paris - Fontaine Saint-Michel” pack from the project allows the Playtest Session to launch normally again.
UEFN displays the following errors:
LogValkyrieSyncProject: Error: Failed to Query project dependency API: Failure ErrorCode=errors.com.epicgames.content-service.module_not_found
ErrorMessage: Could not find the requested resource for path /api/content/v4/module/c7bf5649-4a41-860f-f845-4590d078b952/version/2/staged-files/public/api.json
The affected module is:
c7bf5649-4a41-860f-f845-4590d078b952
Expected Result
The project should successfully validate its dependencies, synchronize with Epic’s services, and allow the Playtest Session to launch without any errors.
Observed Result
Project validation fails, and the Playtest Session cannot be launched.
I also confirmed that removing the “Paris - Fontaine Saint-Michel” pack from the project completely resolves the issue, which appears to indicate a problem with the Fab content dependency or backend service.
Here is the affected product:
Platform(s)
ON PC
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Additional Notes
I have to say that this situation is particularly frustrating, especially since I purchased this pack and therefore expected to be able to use it normally in my UEFN projects.
At the moment, this issue makes the pack completely unusable, as it prevents me from launching a Playtest Session. I would therefore appreciate it if you could investigate this issue and resolve it as soon as possible, as I believe it is entirely reasonable to expect to be able to properly use a product that I have paid for.