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The original was posted on /r/openssl by /u/Awkward_Tomatillo845 on 2023-07-25 06:43:09+00:00.

Hi, i spent quite a lot of hours trying to figure this out but unfortunately to no avail and I hope to get some guidance here. I am using R to curl a website with a certificate attached and unfortunately I keep getting the error as per the title. I have tried to downgrade OpenSSL to 1.1.1s and Curl to what my Git uses which is 7.86.0. The website supports TLS 1.2 that I checked on the openssl analysis website: https://www.ssllabs.com/ssltest/ - Signature algorithmSHA256withRSA

I have also tried to disable firewall and does not work.

Any ideas, what else I can try to make it work? thanks.