UEFN session fails with “At least 1 module failed remote validation” and does not identify the failing module

Summary

My UEFN project suddenly stopped being able to reliably launch/apply changes because remote validation fails with the message:

“At least 1 module failed remote validation.”

The project was working normally earlier the same day. I fixed the validation issues that were previously shown in UEFN, updated/fixed redirectors, saved all assets, restarted UEFN, and also used Clear Source Files Cache, but the issue still persists.

The main problem is that UEFN does not provide an actionable asset or module name for the remote validation failure, so I cannot determine what is actually causing it.

This currently blocks me from testing and updating my project.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Other

Steps to Reproduce

Open the affected UEFN project.
Save all project changes.
Launch a session or attempt to apply changes to the running session.
Wait for UEFN to perform remote validation.
UEFN fails with “At least 1 module failed remote validation.”
Check Message Log / Output Log.
No clear failing asset or useful module name is provided that allows me to fix the issue.
Troubleshooting already attempted:
Fixed all visible validation errors.
Fixed/updated asset redirectors.
Saved all assets.
Restarted UEFN.
Restarted the project/session.
Used Clear Source Files Cache.
Retried remote validation multiple times.
The same remote validation failure continues.

Expected Result

The project should pass remote validation and successfully launch the UEFN session / apply changes.

If validation fails, UEFN should clearly identify the exact asset, package, module, or validation rule that caused the failure so the creator can fix it.

Observed Result

Remote validation fails with:

“At least 1 module failed remote validation.”

The session or update process is blocked, but UEFN does not clearly identify the failing module or asset.

This started suddenly even though the project was working normally earlier the same day, and the issue continues after fixing the visible validation errors and performing the troubleshooting steps listed above.

Platform(s)

windows

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