Cannot Preview PWA App

I’m not sure if this is supposed to work or not, but I cannot use preview mode with a PWA app. I cloned the PWA boilerplate project from “https://github.com/Wappler/PWA-Boilerplate” and set it up according to the YouTube videos (https://www.youtube.com/c/Wapplerio/videos). While I am able to get it to run in a browser, clicking the eye icon for preview in Wappler fails to work. It just says File C:\Data\Wappler\Projects\MySite\about not found. Is this expected because of the way the PWA app is working that is not compatible with preview mode? I know I can select a route in the right app structure and it will show, which is fine, or even just keep refreshing the external browser, but just wondering if it can/should work there also.