Unreal Engine 5 crashes when adding objects

Development Platform & Builds
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1

Hi,

I have a fresh install of Unreal Engine 5 on Windows 10. Whenever I create/load a project, and then try to add any object to my level, the engine immediately crashes with the following error message:

Assertion failed: MacAddress.Num() == 6 [File:D:\build++UE5\Sync\Engine\Source\Runtime\Engine\Private\LevelActor.cpp] [Line: 292]

It happens seemingly no matter how I introduce new objects to my level — whether it’s adding them from the menu, dragging & dropping, or copy & pasting something.

I’m completely new to UE, so excuse me if there’s something I’m missing. I have tried Googling the problem, but nothing helpful has come up.

I hope someone here can help me :pray:

2

So as it turns out, MacAddress is literally referring to your networks on your PC. 1. I had a ton of disconnected virtual network adapters piled up, so I disabled them all, and now I can place actors in my levels without it crashing.

3

Woah… what an unlikely solution to such an odd problem. But sure enough, disabling all my inactive network adapters fixed it! Thank you for sharing the solution with us :slight_smile:

4

重启电脑后解决了, 奇怪的问题