Messages doesn't work with Google Hangouts after High Sierra Upgrade
The Messages app doesn't work with Google Talk after I upgraded to latest version of MacOS - High Sierra. Now when I attempt to use Messages to chat via Gchat, I get the error "Support for the targeted service Google Talk has been discontinued". This is not a change on the Google side of things. This is specifically related to MacOS. I have other computers not upgraded where it DOES work.
I removed the Google Account from the System Preferences and added it back and now I can't use it for Messages - the account just doesn't show up in the Messages preferences. I tried to add it again as Jabber accounts and that doesn't seem to work AT ALL.
Really bummed I upgraded. I use Messages all the time - it's my number one app. I used it to chat, text and apple message. Now I can't...
Does anyone know how to get Messages to work with Google again?
MacBook Pro with Retina display, macOS High Sierra (10.13)