Normal parameter using "world align normal" in a material

Hi to all, I am trying to use a normal parameter with a world align normal function in a material.

I cant use the sampler type as normal and can only resort to using color for it which caused the material in stripe mesh to look darken like the following image.

How can i use it correctly? Any alternative method in solving the issue?

This material function expects normal map as texture.

Thanks. It seems that the “default” texture has to be any other normal map in order for the function to work instead of the assigned parameter value. Kinda of strange.