Upon further investigation here, it appears that there is a known issue with Unity 2019 and the API Updater. You need to install it to a location without a space in it, like C:\Unity. We are working on it.
How do I install to a different location with Unity Hub? I’ve spent 30 minutes trying to figure this out. From poking through buttons to searching the boards.
I can install Unity Hub to a custom directory (c:\unityhub) . However when I have UnityHub install Unity it uses c program files directory system. I can’t find a button or option to change install directory there. I’m not sure Unity has the option to “not use” the hub anymore.
ok… so go to archives
download 2019.1.3 windows installer
same old same old