Apple Messages 8.0 not working with Google Talk
Apple Messages will not log into my Google Talk. I set up the account using the autodetect for Apple Mail. It often won't log in successfully at all. When it does succeed at logging in, the connection usually drops out after a few minutes. This is extremely frustrating because it often drops out mid-conversation. When I click the little caution icon, it says:
Messages can’t communicate with the Google Talk account “...”.
Could not connect to host talk.google.com
It never reconnects when attempting to hit the lightning bolt or caution icons in Messages window. Sometimes it reconnects successfully when selecting File -> Log In, but this often fails as well. My Google Talk account is the only account I have enabled, so I don't think the problem has anything to do with interactions with other accounts.
I haven't found a thread that describes the situation I'm experiencing exactly. Some related threads suggested settings changes that might fix the problem, but the account preferences won't let me make any edits, presumably because Google accounts are supposed to be auto-configured. I also cannot disable the account and re-add it manually, because OS X accounts detects that it's the same account I also use for Mail.
MacBook Pro with Retina display, OS X Yosemite (10.10.5)