So I was using zenmate VPN extension on chrome for a year and today I finished using it and I turned it off but then no website would load without it and I would get the error: NET:ERR_CERT_AUTHORITY_INVALID, on every website and I couldn’t fix it so I turned on the VPN and downloaded firefox and it works just fine. I uninstalled chrome completely and reinstalled it and the issue is still persistent. Even Internet explorer gives me the same error but mozzilla works just fine without the VPN.
IE and Chrome use the same proxy settings. Try clearing them out.
If that doesn’t help, they also use the same trust anchor store (CA certificates), so maybe something is wrong with that.