
This problem may be caused by a group policy called PreventIgnoreCertErrors. This policy setting prevents the user from ignoring Secure Sockets Layer/Transport Layer Security (SSL/TLS) certificate errors that interrupt browsing (such as "expired", "revoked", or "name mismatch" errors) in Internet Explorer (mode).
In registry editor, please go to Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings and check if you have the key PreventIgnoreCertErrors. Value 1 is for Enable and 0 is for Disable. If so, please remove the key PreventIgnoreCertErrors, or set it to 0.
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Best Regards,
Shijie Li