This error occurs when the website has not enabled SSL connections or has blocked port 443. This prevents the browsers from establishing a connection. On the server and any firewall in front of the server ensure that port 443 is open and than the site is configured to accept SSL connections.

Windows Server

For Windows you may have a corrupt Certificate Store. Try running the repairstore command against your certificate. See:

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  • crzy

    how to fix thath,
    ssl 2.0 and 3.0 aren’t solve my problem

  • S

    Having the same problem. Only opening that port or anyone for that matter, doesnt help. Other computers on my network can connect to the site in question, just not my desktop…