I make copies of my projects as I progress, to keep things safe in case a job gets destroyed. I came into this project I'm working on and all the vertices on the characters body are frozen, I can't move them at all. It is only the body, everything else I can edit, as you can see I have moved a vertices on the characters tunic. Everything is up to date, Blender 3.4.1, OS updated, drivers updated. I had this happen about a year ago and ended up going back three revisions and building back, a real time consumer. The selection operator is enabled in the outliner, it just will not let me move any vertices on the character itself.