win32util unknown source error

I am in the process of setting up Sikuli for the first time

I'm following this FAQ:

https://answers.launchpad.net/sikuli/+faq/2005

And I am on this step:

""""""""""""""""""""""""""""""""""""""

# starts an interactive snapshot
img = capture()

""""""""""""""""""""""""""""""""""""""

My error is:

at com.sun.awt.AWTUtilities.setWindowOpacity(Unknown Source)
at org.sikuli.script.Win32Util.setWindowOpacity(Win32Util.java:80
at org.sikuli.script.TransparentWindow.setOpacity(TransparentWindow.java:10

This error displays multiple times.

I am assuming I am missing something here. Perhaps the Win32Util file or something???

Any help appreciate. Ty