Help! My geometry is importing with missing polygons

Importing geometry from ZBrush as fbx. I decimated the polycount to 250,000 in Zbrush before bringing it in. It’s triangulated and has a UV map. When I import the geometry into Unreal it’s missing polygons and I don’t know what I’m doing wrong. New to Unreal.

This error does come up when geometry is imported, I’ve added a screenshot of the page it links to. I don’t understand what’s wrong though.

Help would be appreciated.

Would you be able to send a screenshot of the import settings? Do you have Nanite enabled when importing this mesh? If so, try disabling it.