<![CDATA[Certificate errors when completely valid]]>I'm getting a consistent error when trying to access a load of sites (sometimes even Opera's own sites) saying that the certificate is invalid.

NET::ERR_CERT_AUTHORITY_INVALID

I'm on a MacBook Air Big Sur 11.3.1, Opera is 88.0.4412.53 (arm64)

I have tried uninstalling all VPN, I've wiped all cookies through Opera, and uninstalling and reinstalling Opera.

When it links to a site that says it is not secure, I click on the "Not Secure" sign next to the webpage, and it says the Certificate is not valid. If I click on this, I get three certificates, all which come up as "valid" - so I'm not quite sure what's going on or how to solve it as I'm restricted with loads of my web access.

]]>https://forums.opera.com/topic/61282/certificate-errors-when-completely-validRSS for NodeTue, 18 Aug 2026 18:41:23 GMTWed, 29 Mar 2023 08:23:01 GMT60<![CDATA[Reply to Certificate errors when completely valid on Wed, 29 Mar 2023 12:11:43 GMT]]>@pierrefl Did you try updating Opera and the OS? Current stable version of Opera is 97.

]]>https://forums.opera.com/post/305288https://forums.opera.com/post/305288Wed, 29 Mar 2023 12:11:43 GMT