It is essentially a circular expression when you read pixel normal inside of the normal part of the shader. You will have to specify the normal map manually and transform it into the desired space.
Hello I am having the same problem trying to create a similar texture.
My Up vector shader works fine for everything but the normal map. I am getting the same error as above.
siebencorgie: Did you understand RyanB’s solution? Can you share? I’m not sure how to specify the normal map manually and transform it into the desired space.