Migrating template cause Assertion failed crash

Hello there.

So I am working on an arch viz project and I purchase the ArchVizUserInterface3 from Stefan Doetschel website, after migrating his project into my project as instructed when I press play the project crash and give me this error.

-Assertion failed: Src [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/CoreUObject/Private/UObject/Class.cpp] [Line: 3034]

I have no Idea what it means or how to fix it, I am able to press play before I migrate and also when Open his project and press play it work fine as well.

I would really appreciate if anyone could give me some info on this error and a potential fix would be amazing.

Hi there

Did you happen to get this working as I am having the same problem…