Crash every second program start

I’m getting these strange crashes every second start. I run the program once, terminate, then start again and I get this here:

Assertion failed: !HasAnyFlags(RF_NeedLoad|RF_NeedPostLoad) [File:D:\Build++UE4+Release-4.13+Compile\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectLinker.cpp] [Line: 102]
Detaching from existing linker for …/…/…/…/…/…/UnrealProjects/Client/Content/UMGMiniMap/MiniMap/MovePanel.uasset while object Image /Game/UMGMiniMap/MiniMap/MovePanel.MovePanel_C:WidgetTree_2122.Image_14 needs loaded

Sometimes however this does not happen at all, I can’t make out any pattern. the MovePanel is an UMG widget and the Image, I dont know. Perhaps the render target texture that the minimap renders.

Any idea why an opject can cause this error at program start when there should be nothing in memory?

Thanks

I was not able to figure out the exact reason. However I did some extensive changes to the MiniMap widget which I bought from the marketplace and it is clear that my changes caused this behavior. Just what exactly it was, I don’t know.

The way I solved this was by reverting to the original MiniMap system and then re-implementing my changes step by step and while keeping the changes to a minimum this time.

Now everything works.

Whatever this error means and how it can be triggered however is something I still don’t understand