My water dont appear

Hey!

I have a problem that i cant fix. I have added ocean, river and lakes for unreals on water plugin. But one day i startet my project all the water was gone.

Its there, but i cant see it. The Underwater Postprocess Material are there. but no water at the top.

i have tried to looked up the water material but cant finde anything wrong with it. I startet a new project and copie all the water material to my old project. Dont work.

If anyone have a solution i will be glad to hear it. Can say that i have a open world game that i am making with a hightmap.

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