calling await cardano.yoroi.isEnabled() throws _cardano_rpc_call is not a function

[grim-i-am]

Browser: Chromium Version 97.0.4692.99 (Official Build) for Linux Mint (64-bit)

calling await cardano.yoroi.isEnabled()

throws error: Uncaught TypeError: cardano._cardano_rpc_call is not a function

  function cardano_check_read_access() {
    if (typeof cardano !== "undefined") {
      return cardano._cardano_rpc_call("ping", []);   <===== Error thrown here
    } else {
      return Promise.resolve(false);
    }
  }