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See https://netbeans.org/bugzilla/show_bug.cgi?id=229582#c9 PhoneGap must start internal web server (otherwise URLMapper don't work correctly). Also browserURLMapper.setServerURLRoot("http://localhost:8383/" + p.getProjectDirectory().getName() + "/"); is quite suspicious.
Taking over.
I am sorry but I am really not sure what this issue is about exactly, more information is needed :/ Thanks.