secp521r1 Certificates Unsupported?

[davidemerson]

When trying to load a site with a secp521r1 certificate, such as nnix.com, I get "The operation couldn't be completed. (Network.NWError error 2.)". Might be cipher suite support? This works on browsers other than Elaho.

[davidemerson]

I do believe this is simply cipher support, I backed off to an older cipher, and things worked, so maybe this is rightly, "secp521r1 certificate support"