Hey there @liyangyang0901 ! Could it be that your landscape is being checked for HLODs? This has been the case for a couple questions I’ve seen recently:
Hey, thanks for the reply. I think this was fixed by switching the Targeted RHI to DirectX 11. Before doing that, I actually couldn’t even load the level in PIE - Separate Window mode, or the same crash would happen.
Edit: After testing more builds this was in fact caused by THE HLODs