Landscape grass doesn´t appear while simulating

I´ve followed this tutorial: https://docs.unrealengine.com/latest/INT/Engine/OpenWorldTools/Grass/QuickStart/4/index.html

but when i try to play, all grass disappear. I just don´t get it.

Look at the screenshots:

Hi BrunoChaves,

I was unable to reproduce your issue. Could you go back and make sure you followed the steps of the tutorial exactly. Also did you do anything in addition to the tutorial?

If you manage to get this issue to occur with just the landscape + grass, and you are sure that you followed the tutorial correctly please attach information on your system specs.

,