UEFN Validation Error: Disallowed Reference to NavigationSystemV1 After UE5 Migration

Summary

Getting this error when trying to launch a session:

LogValkyrieValidation: Error: Disallowed reference to /Script/NavigationSystem.NavigationSystemV1, Referenced by:Content/Meadow_Environment_Set/Maps/MeadowsENV.umap (World), Plugin mount point:/SSMeadows.
UEFNValidation: Error: Disallowed reference to /Script/NavigationSystem.NavigationSystemV1, Referenced by:See below for asset list, Plugin mount point:/SSMeadows.
UEFNValidation: Error: /SSMeadows/Meadow_Environment_Set/Maps/MeadowsENV

This level was initially migrated from UE5 and had a few other disallowed object types that I was able to either fix manually or through running a validation fix-up. But, for whatever reason, running a validation fix-up doesn’t affect this error and I have no clue how to fix manually as I can’t seem to find any NavigationSystem info within my level/world or project settings.

I have also tried resetting any Navigation Systems settings to default within the World Settings of UE5 project and tried re-migrating but I stil get this error. I’m also not the most experienced with UE5 so I definitely could have missed something.

Any ideas what I could be doing wrong?

Edit: I was able to copy every actor from one level into a new level created within UEFN BESIDES instanced foliage and then a session will launch and I can play within my level. So, I thought the issue was with instanced foliage and deleted all of them and tried launching session within the imported UE5 levels but still receive the same error. So then I tried going through and individually deleteing meshes, landscape, and foliage until there was nothing except for Island Settings, WorldDataLayers, and WorldPartitionMiniMap and the session stil won’t launch.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Other

Steps to Reproduce

  1. Migrate level from UE5 to UEFN
  2. Open Level with project in UEFN
  3. Attempt to Launch Session
  4. Receive error

Expected Result

Session Launches

Observed Result

Project is not valid, see message log for more detail; Run Validation Fix-up; Project validation failed pop-ups and session does not launch as intended.

Platform(s)

windows

hi @Reeyawn ,
You can only import assets using
Converting Assets into Props in Unreal Editor for Fortnite | Unreal Editor for Fortnite Documentation | Epic Developer Community
or
Importing Assets in Unreal Editor for Fortnite | Unreal Editor for Fortnite Documentation | Epic Developer Community

If you try and import from a Migrated Asset in UE5 5.* engine
everything is disallowed in UEFN/Fortnite

UE5 PYTHON Is not supported in UEFN as this is a subset of the Enginr
Disallowed is for anything not imported in Fortnight
see

Asset Validation Issues - Issues and Bug Reporting / UEFN Validation - Epic Developer Community Forums

1 Like

Ahh, I gotcha. Thanks for the info!