My textures from the landscape dissapear?

Hello and thank you for watching this thread!

I’ve been starting my first project on ue4, before that i tried many engines and this time i wanted to try unreal, today i’ve been doing some basic landscape sculping and then i started adding some textures.

Then i saved the project and went out, when i came back and opened the project i saw something which surprised me, the textures i draw dissapared, most of them, i dont know what made this problem, also i had some foliage draw but i set it to non visible for better perfomance and when i tried to set it to visible it didnt change nothing

Maybe if i can open something like a console could tell me the errors?

Im a newbie trying to learn, hope you can help me

i attach some captures