Hi,
first I was trying to run run --schema examples/shacl/user.ttl --engine SHACLEX -o examples/user.svg and the result was

So my guess was that my command was wrong. Maybe a wrong engine or something. But then I looked at the official example. The provided UML file is rendered as

So my conclusion is: SHACL to UML does not work at all. Or am I missing something?