Trying to install 10.15 Catalina in a 50GB partition and it keeps stalling at "About 3 minutes remaining." Any suggestions?

can we not post screenshot pics or videos to this forum? I see the icon to attach but when I click it nothing happens.

Tried CarPlay in iOS 13 today and everthing else works as described. However, when pressing the steering wheel button for Siri nothing happens. The screen dims slightly as if the Siri animation is starting, but it never appears and sound effect for Siri is missing.

Been slowly going through apps after installing beta and so far only Aruba VIA VPN won't connect to a client's server. Other VPN's, including Cisco AnyConnect, work. Any ideas of what to try?