Problem with baked normal map from blender

[rise678487]

I need your helps in this case :

There is a strange straight line in mesh with normal map as this image :

I saw a video that fix this problem but in Blender by change color space to non-color data…unfortunately,this seems like there no option like this in ue4…
:

There is some screenshots in case sb want to know the details …

UV :

High res mesh :

Low res mesh:

[Hyperloop]

Does the line follow along a UV seam?

[rise678487]

yes…it follows along with a seam line