message: fall back to the old method if the default key isn't available
diff: @@ -105,9 +105,12 @@ async function getSecretStorageKey(
  // use the default SSSS key if set
  keyInfo = keyInfos[keyId];
  if (!keyInfo) {
  - throw new Error("Unable to use default SSSS key");
  + // if the default key is not available, pretend the default key
  + // isn't set
  + keyId = undefined;
  }
  - } else {
  + }
  + if (!keyId) {
  // if no default SSSS key is set, fall back to a heuristic of using the
  // only available key, if only one key is set
  const keyInfoEntries = Object.entries(keyInfos);
  