How do you stop ue4 from crashing when making a new landscape

every time i decide to make a new landscape unreal stops working, crashes and forces me to close the window so i have to restart unreal

Are there any errors shown? It could be unreal, another program or a driver related issue

Maybe you are running out of memory?
What is the size of the landscape that you are trying to create?

Did you try creating the landscape without a material?