Dragging an item from the Content Browser to the Viewport freezes UE4

When I drag an Item (Static Mesh) from the Content Browser to the Viewport, then Unreal Engine 4.19.0 freezes.

Do you know how to solve that problem?

System Information:
Unreal Engine 4.19.0
Operating system: Windows 10 64-bit
Graphics card: NVIDIA GeForce 840M (Display Memory: 2GB)
Processor: Intel(R) Core™ i5-4210M CPU @ 2.60GHz (4 CPUs), ~2.6GHz
Memory: 4096MB RAM (less than 8GB)
Page file: 5283MB used, 2420MB available (I’m runing UE4 with a no starter content project using the KiteDemo library).

I know that UE4 needs 8GB RAM. Is because I use only 4GB RAM then the problem happens?