Put the contents of this zip inside your root project folder or just open the zip, click into the content folder and then copy the landscapegroundtest folder into your project’s content folder. Go into the material function and click on the four nodes, in the red comment box, in their settings, put some real textures that it can default to (the function defaults to them, but needs them to have something in them). Go into the material and start plugging in your actual textures that you want to use. Apply it to your landscape.
There is no way I’m trying to upload 330mb on a weak connection.