You're trying to call a method of a closed object. Usually, it happens when you
call the `close()` method of an object (or its owner) prior to calling methods
of that object.

Another common cause of this exception is working with cached DOM or JavaScript
objects. For example, if you navigate to another web page and try to call
a method of a DOM or a JavaScript object from the previous page, you will get
this exception.

It's also possible that the native Chromium process has crashed. In that case,
all the objects that belong to that process are closed automatically.

The following article explains this exception in detail: https://links.teamdev.com/jxbrowser-object-closed-exception
