I'm trying the basic user registration with WebAuthn following https://webauthn.guide/#registration . If pubKeyCredParams: [{alg: -7, type: "public-key"}] is changed to pubKeyCredParams: [{alg: -47, type: "public-key"}] i.e. from ES256 to ES256K (equivalently: secp256r1 to secp256k1) the registration fails with
The question: What can be the cause?
I use emulated authentificator from Chrome DevTools with protocol ctap2, transport internal, support for resident keys, user verification and large blobs.