[Darryl Ramm]

What do you mean “all you get”. Is the rest of the GUI there but not working or not redrawn at all? What exactly do you see on the screen?

Pro Tools 11 is so old and there has been so many bugs fixed. And great features added is there really a reason you cannot upgrade and be on 2019.6?

If you can upgrade to a compatible OS install (do that on a spare disk/partition) then you can test that with the Pro Tools Ultimate free trial.