I’m a front end developer at Freecast Inc. and we have started testing porting our React base web app (developed for webOS and Tizen) to the new Vega OS. The idea is to use the WebView feature on Vega OS to run the builded app inside the WebView source prop.
We have two developers who develop with Macs and successfully built and run our app in the Virtual Device. But I use Ubuntu and when I tried running the app in the Virtual Device, I get the following error message:
2025-10-15 16:17:27.919 [warning] Kepler operation FAILED due to an irrecoverable error: Failed: Installing/Updating '/tmp/freecastvega_x86_64.vpkg' ...error (Module dependency not found)
: error: Unable to install '/tmp/freecastvega_x86_64.vpkg' as the required dependencies are not found on the device.
The Kepler Virtual Device is missing modules that are available on a physical device. Test your app using a Fire TV Stick instead.
The following module dependencies declared in the application manifest are not found: - /com.amazon.kepler.webview_3@IWebview_3
I would like to know if it is ONLY possible to develop/test a Vega OS app with a WebView on MacOS or if some issue has occurred that is not related to Ubuntu.