Why can't I create a new face connecting the selected vertices? As shown in the picture, I've switched on X-ray，selected all vertices and pressed F, but no new face is created.
After that, I switch off X-ray ,selected the vertices again and pressed F, it works.
what is going on?
（Blender Version 2.91.0）
Most likely there are overlapping duplicated vertices. The first image indicates a selection of 48 vertices, the second one 12.
So you should select all A then M to merge and &quot;by distance&quot;.