Paralax Mapping holes in texture

Hello i made a simple paralax set up that works but for some reason there is this problem



as you can see the more steep the angle of view the more texture turns black and i dont know what’s the reason for this


My Shader set up

blend file here

Your texture has a 0 alpha border around the perimeter, and the parallax isn’t quite mapping properly. I tried for a long time to get a parallax shader working, and I was never able to figure it out.