Error sending postMessage from iframe to parent

Question

I want to send a message to the parent window like this:

window.parent.postMessage({type: 'gg', data: '0'}, '*');

But the parent window isn't receiving anything in the useEffect:

useEffect(() => {
    const handleMessage = (event: MessageEvent) => {
      console.log("fsfsfs");
      if (event.data.type === 'toolInfo') {
        const receivedValue = event.data.value;
        console.log(receivedValue); // This will log 'someValue'
        // Do something with the received value
      }
    };

    window.addEventListener('message', handleMessage);

    return () => {
      window.removeEventListener('message', handleMessage);
    };
  }, []);

it is not printing anything. Right now I'm testing at localhost, so the iframe has 127.0.0.1:9001 and the parent has 127.0.0.1:3000.