How come this face has no edges? How can I fix it?

Hi I can’t seem to fix this geometry it has no edges, and I can’t select them.

I tried retracing the face with the Line tool but it does not snap to the point that have no edges.

edgeless face.skp (2.5 MB)

It’s because you’ve given a tag to the edges and turned the visibility of the tag off.

Follow correct tag usage rules. ONLY objects (components and groups) get tags. ALL edges and faces are created and remain untagged.