Why Google Plus is no longer available?
In December 2018, we announced our decision to shut down Google+ for consumers in April 2019 due to low usage and challenges involved in maintaining a successful product that meets consumers' expectations.
What happened to Google Plus account?
On April 2, 2019 we are shutting down the consumer (personal) version of Google+, a social network by Google. If you want, you can download and save your Google+ data; this may take time so get started before March 31, 2019. ... The Google Account you use to sign in to these services will remain.