what does this error mean and how to fix it please?

LogValkyrieValidation: Error: Found disallowed object type /Script/NavigationSystem.NavigationSystemV1, Referenced by:Content/Pyramids/Levels/L_pyramids.umap, Plugin mount point:/MyProjectB.

UEFNValidation: Error: Found disallowed object type /Script/NavigationSystem.NavigationSystemV1, Referenced by:See below for asset list, Plugin mount point:/MyProjectB.

UEFNValidation: Error: /MyProjectB/Pyramids/Levels/L_pyramids

Hello,

Have you placed any “AI Navigation Modification” Devices? (That’s the only Navigation related device I see)

I’d make a copy of the map and start deleting actors relating to the Navigation system to see if you can find out what’s being disallowed. (Guards, Wildlife)

Or alternatively, start re-building the level (You can copy and paste between levels) and launching sessions periodically to find the problem.

I have the same error, Its from the navigational config in world settings in the unreal engine project, I’ve tried the other options from the drop done but had no luck , i also tried setting it to none but couldn’t get it to change.