When switching between “Dialogs“ in demos and any other view, the following error is thrown:
Uncaught TypeError: Cannot set property 'then' of undefined at OoUiWindowManager.OO.ui.WindowManager.closeWindow (oojs-ui.js:22126) at OoUiWindowManager.OO.ui.WindowManager.removeWindows (oojs-ui.js:22293) at OoUiWindowManager.OO.ui.WindowManager.clearWindows (oojs-ui.js:22309) at OoUiWindowManager.OO.ui.WindowManager.destroy (oojs-ui.js:22428) at dialogs.js:330 at wrapper (oojs.jquery.js:732) at Demo.oo.EventEmitter.emit (oojs.jquery.js:809) at Demo.destroy (demo.js:430) at setup (ooui-2016.loc/:62) at dispatch (jquery.js:5206)