I recently ran into an error with a new nginx config that I couldn’t find anywhere on google! Turns out that was because I was reading the font wrongly and substitued a lower case L for a number 1. So if you ended up on this psage because you searched for SSL_CTX_setl_curves_list then try searching again, for SSL_CTX_set1_curves_list.
Just to complete the story — I had nginx throw this error when I included the line
This is because curve names ARE case sensitive, and the first curve is X25519!
ssl_ecdh_curve X25519:secp384r1:secp521r1:prime256v1;fixed it
Credit to github users
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