Adobe Reader Crashing Every Time

I waste hours with Adobe Reader. It just hangs, and hangs and hangs. I have an Adobe Sign accunt and all I want to do is sign a document! I am unable to get out of this endless loop of Forcing Quit and trying to open a document....

Seems like there is some issue with authentication as a white window appears and sits in front of Reader, but doesnt do anything else.

This has been happening for months. I have uninstalled, restarted, changed passwords, checked my account, checked my licencing and nothing has fixed this.

I have checked the network, the connection, and everything is fine. It is just Adobe - it is buggy and bloated.

Image attached.