[CRITICAL] Unable to launch session – “At least 1 module failed remote validation”

SupremeUEFN
Sun, 11 Jan 2026 08:51:23 +0000
Issues and Bug Reporting

Summary

This issue is happening on one of my projects where I am unable to launch a session. Whenever I try, it fails with the error: “At least 1 module failed remote validation.”

I haven’t been able to identify what is causing this. It’s also not limited to just me, multiple people in the community and on my team are experiencing the same problem.

Previously, switching accounts would temporarily allow the session to launch, but now both of my accounts are affected and returning the same error.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Other

Steps to Reproduce

Attempt to launch a session on the affected project. (This may not occur on other projects, as only this one is impacted.)

Expected Result

The session should launch successfully.

Observed Result

Launching the session fails with the error “At least 1 module failed remote validation” preventing the session from starting.

Platform(s)

PC

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Additional Notes

We really hope this gets resolved soon, as it’s heavily impacting our work. We will be unable to update existing maps or launch new ones if this error occurs across all team members accounts.

Here are some related threads:

At least 1 module failed remote validation on main account but not alt account. Issues and Bug Reporting

Summary When i try to launch a session on my main account, I get “At least 1 module failed remote validation” error, but launching a session on the same project from a different account works fine (Same PC). and that goes for every single project. i created this new project to confirm it’s not project-related. Project ID: 75fb80f8-47e1-5de1-7ef2-2aa8abc939d8. Please select what you are reporting on: Unreal Editor for Fortnite What Type of Bug are you experiencing? Other Steps to Reproduce Ope…

At least 1 module failed remote validation Issues and Bug Reporting

Hi, I had the same issue and found a solution. The problem is related to the team and your account. If you can leave the team and return, the issue will be resolved. Another option to resolve the issue would probably be to transfer the project to another team.

46 posts - 20 participants