Tutorial: Baked River Simulations - Overview and Quick Start

Getting the same error if anyone has any answer pls let us know

@DevonPenney Hi, I’m trying to pack a project with ShallowWaterRiverActor, but when I start the game, the water is not visible. But the post-process is working , I think that the problem is in the baking material .
How can I solve this problem with the build (Development, Shipping is not working)?