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brettr
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Why does one computer fail to connect to website?

When I visit udemy.com in Safari, I get this error:

Safari can't open the page https://www.udemy.com because it can't establish a secure connection to the server.

In Chrome, it shows this:

Your connection is not private.
Attackers might be trying to steal your information from www.udemy.com (for example, passwords, messages, or credit cards). NET::ERR_CERT_REVOKED

This happens on one specific Macbook. My iMac and iPad on the same network have no problem. I connected the Macbook to my cell network and same issue.

What would cause this on one computer?  I've cleared cache/cookies in Safari and also reset the DNS cache. No difference.
Mac OS XWeb Browsers

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brettr

8/22/2022 - Mon
Dave Baldwin

I checked their certificate and they just renewed it on Oct 11.  Did you try again today?
brettr

ASKER
I've tried many times.
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Dave Baldwin

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brettr

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The computer is up to date.
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SOLUTION
Eoin OSullivan

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brettr

ASKER
Looks like this updated on its own for this specific computer after a day or two.

@eoinosullivan: Nothing in Keychain about a certificate for this website.