Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

When connecting to an internal website, I'm getting an error: "Certificate contain unknown critical extension." What does this mean?

  • No replies
  • 51 have this problem
  • 6 views
dhunt03
dhunt03
more options

I am getting a connection failure when trying to connect to an internal web site: 

    Secure Connection Failed

    An error occurred during a connection to <sitename>.

    Certificate contains unknown critical extension.

    (Error code: sec_error_unknown_critical_extension)

Can you give me a general idea what the error is and why I would be getting this error?

Thanks in advance...

I am getting a connection failure when trying to connect to an internal web site: Secure Connection Failed An error occurred during a connection to <sitename>. Certificate contains unknown critical extension. (Error code: sec_error_unknown_critical_extension) Can you give me a general idea what the error is and why I would be getting this error? Thanks in advance...