What was claimed
Any vaccine that needs to be stored and shipped at -80 degrees isn’t a vaccine. It’s a transfection agent, kept alive so it can infect your cells and transfer genetic material.
One candidate RNA vaccine does have to be stored at close to this temperature. It is still a vaccine though, and other vaccines, such as the Ebola vaccine also had to be this cold. This RNA vaccine is in no way alive, although it does contain genetic material that can be read by human cells.