I have developed a custom widget and the widget is working just fine. So I started writing the setting files for the configuration page. Unfortunately no matter how I try, when I add the widget to the app, it just show the loading screen for the configuration page, and I checked the network, it seems not loading Setting.js and Setting.html at all. However I can still click "OK" to skip the configuration and proceed to load my widget to the app.
How to debug the setting.js and setting.html?