------------------------------------
// Algorithm Object
var algorithmKeyGen = {
  name: "RSASSA-PKCS1-v1_5",
  // RsaKeyGenParams
  modulusLength: 2048,
  publicExponent: new Uint8Array([0x01, 0x00, 0x01]),  // Equivalent to 65537
};

var algorithmSign = {
  name: "RSASSA-PKCS1-v1_5",
  // RsaSsaParams
  hash: {
    name: "SHA-256",
  }
};
------------------------------------

The hash parameter has moved into the generation algorithm, and is no longer required for the sign operation.