Tag archive
NET::ERR_CERT_DATE_INVALID means the certificate is outside its validity window right now. Google's data shows a wrong device clock causes it far more often than an expired certificate. Here is how to tell which it is, and how to fix both.
The certificate is real and unexpired, but it was issued for different names than the one in your address bar. Here is what causes ERR_CERT_COMMON_NAME_INVALID and how both visitors and site owners can fix it.
NET::ERR_CERT_AUTHORITY_INVALID means the browser could not build a trust path from your certificate back to a root it trusts. Here are the seven causes, how to tell server faults from device faults in 30 seconds, and the exact fix for each.