//waits for the "uninstall Norton" solutions
Seriously though, I would, and get a better anti-virus solution. I tend to use Comodo, which has a free version, and provides anti-virus, firewall and defender properties.
As for the issue itself, I do suspect it's probably Google, changing something at their end that interferes slightly with the way that Norton is expecting results and flagging them up.
I can relate, the app I work on recently started crashing when you tried to email, even though the current version has been out several weeks and was tested. Turns out, it was something changed in a backend server that the app relies on, and it was getting back a different response to a message it passed, and couldn't interpret it correctly. Thus it died eventually due to a null exception.
The app also supports cloud storage from a number of providers. A couple of years ago the app started crashing when attempting to access Google Drive. Turns out Google had changed something their end, and our interface could no longer interact with their servers correctly. Some quick fixes (and responding to HUNDREDS of complains in a few days) sorted it out and a new version uploaded to the App Store in a week.
So if you have software A interacting with solution B, and it stops working, and B is a behemoth, don't be surprised that it's something B has changed randomly.