We knew Google+ was shutting down but Google announced they are now expediting this process since a new security bug was discovered with the Google+ API. 52.5 million users in connection with a Google+ API potentially had their name, email address, occupation, age and other information stolen.

Google is moving up the closure of the consumer Google+ from August 2019 to April 2019 and closing down all the Google+ APIs in the next 90 days.

Google wrote:

FYI – I believe that image above is from Halloween when Googlers dressed up as Google+ Ghosts.

Forum discussion at WebmasterWorld.