Mesh Terrain just not working

General Issues and Bug Reporting (Unreal Engine)
1

Summary

Mesh Terrain unsuable - takes forever to load on a basic rectangle and when trying to play in standalone crashes on an empty mesh terrain map.
Assertion failed: ComponentNativeClass [File:D:\build++UE5\Sync\Engine\Source\Runtime\Engine\Private\WorldPartition\WorldPartitionActorDesc.cpp] [Line: 913]

What Type of Bug are you experiencing?

World Creation Tools

Steps to Reproduce

make a basic terrain mesh landscape and just press play standalone.

Expected Result

it should load - mesh terrain just doesnt work.

Observed Result

crash

Affects Versions

5.8

Platform(s)

Windows

2

What I have done…

I know that this shouldn’t make a bit of difference, but have you tried it with an imported heightmap?

Have you set your World Settings to be loading your Game Overide Setting?

Is there a PlayerStart loaded onto the map?

I have successfully imported a 8k map and ran across some of it. Runs like crap but it works.