It can't find the method because the method takes a ResourceBundle parameter, so it looks for a method that takes no parameters, which doesn't exist.
I've added the appropriate resource bundle to the script context under the var "bundle". So, your script would be "events.get(0).message.getLocalizedMessage(bundle)". This will be available in the next release.
Do note though that the rendered events should appear in a warning rollover to the left of the component.