ComponentComponent pagesdemo2demo2 does not have a method sub to handle event tap pagesdemo2demo2 does not have a method sub to handle event tap

This error message suggests that in the "demo2" component of the "demo2" page, there is no method called "sub" that can handle the "tap" event. The code that triggers the "tap" event is likely trying to call the "sub" method, but it doesn't exist in the component. You will need to either create a "sub" method in the component or adjust the code triggering the event to call a different method that exists in the component.