This seems like a very obvious FP. Google & Google Play are safe sites, and there's no reported hacks or attacks going on against them. The affected url seems to be google play, which somehow seems to be twined to all other google services and ergo inescapable. I would prefer not to see this on nearly every google login page I'm on, the ringing sound is incredibly annoying.
Moreover, the Avast online security plugin is also claiming that the Google Play store is unsafe. I've used this AV for years and this kind of issue, especially with a major site like google, has never happened to me before.
I don't know what's going on, but it's bothering me, and I'm pretty sure it's a FP.
EDIT: thank you all for being so quick to try and correct the error, hopefully after the 30 min threshold it stays fixed