Hi, you are right, some basic bootstrap functionalities do work without the paid version. Unfortunately most of the functionalities you can see in our docs for alert (dismissible alerts included) would require to use the pro version.

From what I can see though, the method close is available in free version so you can create a dismiss button yourself.

Don't add the data-mdb-dismiss attribute to the button and call the close method. Something like this should work

  const instance = mdb.Alert.getInstance(document.getElementById("alert"));

  document.getElementById("dismiss").addEventListener("click", () => {
    instance.close();
  });

Best Regards!