At least 1 module failed remote validation on all new UEFN project changes

Development Programming & Scripting C++
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1

I have been dealing with this issue for at least 2 weeks across multiple devices and multiple projects.

Every time I try to Launch Session after making ANY new change, I get:
“At least 1 module failed remote validation”

This happens on:

  • Multiple different maps/projects

  • Multiple PCs/laptops

  • Completely blank projects

  • Different internet connections (including phone hotspot)

Important:

  • Existing previously completed projects can sometimes still launch IF I do not edit them

  • The moment I make any new change, validation fails

  • Even a brand new blank island with only 1 wall and 1 prop fails

Things I have already tried:

  • Verified Fortnite and UEFN files

  • Cleared UEFN cache folders

  • Cleared Epic Games Launcher webcache

  • Restarted PC multiple times

  • Ran Epic Launcher and UEFN as Administrator

  • Tested on phone hotspot

  • Tested multiple devices

  • Tested blank projects

  • Built Verse code

  • Waited for asset registry/indexing to finish

  • Save All before launch

Logs often show:
“Failed to begin reading directory changes”
and:
“At least 1 module failed remote validation”

This no longer appears to be project-specific. It seems related to the upload/validation pipeline for new modules or new project changes.