Web Reference: Based on my recent experience, I believe that the message " self signed certificate in certificate chain" tells you the issue exactly - which is that whichever SSL site you are trying to access has a certificate in the chain that is not in the bunch that is referenced by cacert.pem. Nov 29, 2024 · To address this, I’d suggest checking if you have any security plugins activated that might be blocking our requests. If not, try contacting your hosting provider and asking them to check their security logs to see if they are blocking or otherwise limiting incoming and outgoing connections over XML-RPC. Feb 21, 2026 · WP HTTP Error: cURL error 60 explained. Why it hits older WP sites, how to fix the SSL certificate bundle, and a temporary workaround to get you unblocked fast.
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