Physical Water Surface

Hello!

I just bought Physical Water Asset and I have a problem. The water looks OK in the editor, but totally red when started the game.
I figured out that it probably relates to my character as I don’t get the issue if I use a standard spectator pawn.
Have you any idea what can cause this?
thanks

I have also a + question, how can I get beach foam? I have a lake with long beach and would be fine to get foams and some opacity in shallow waters.