Why does my LG Android keep getting CONNECTION IS NOT PRIVATE for Google

[EDRYCE]

On 08/18/17, my LG Android phone/computer began getting "YOUR CONNECTION IS NOT PRIVATE! Attackers might be trying to steal Ur info. NET::ERR_CERT_AUTHORITY_INVALID." This pops up for every Google website (www.google.com and support/google.com, etc.) I also hv a Samsung tablet, which does not have same issue. I also "lost" my Gmail acct on phone about 2 weeks ago. Can anyone help me? Thanks

 

[anon(238680)]

Welcome to Android Central. What do you mean you lost your Gmail account? Have you gone to your online account and checked to see if everything is okay there? Are you signed into the Google account on your phone?

 

[EDRYCE]

Yes, I WAS signed into my gmail account on my phone until 08/18/17 when the issue, explained above, occurred. I have not been able to get into my EMAIL, or any google "platform" that requires me to UPDATE GOOGLE PLAY SERVICES. Everytime I TRY to update same, I get: WE ARE HAVING PROBLEMS WITH GOOGLE PLAY. PLS TRY LATER, or, CANNOT CONNECT TO GOOGLE SERVERS. TRY LATER.