Unreal Crashes / Freezes when I import some assets from Quixel Bridge

I’m a beginner in Unreal 4, and I was watching some tutorials about it on Youtube. Then I heard that you can use free assets from Quixel’s Bridge. I installed it ( Both the plugin in the UE4, and the program itself ) and opened it.

I downloaded one of the desert assets, and I exported them like the tutorials said, and at first, It did import the materials, but whenever I clicked them, it would just freeze.
Then I tried another asset,and it didn’t even imported it in UE4 this time, even though it says that it sucsesfully installed the asset.

( I’m turkish so sorry if my grammar’s not the best. )

it can be a bug, report it here