The webview plugin is required for iOS, but it shouldn't be present in Android. That's a problem because Cordova doesn't let you specify that you want to use a plugin only in one platform. So for now you'll have to manually remove the webview plugin when building for Android, and add it again when building for iOS.
We have this issue to fix this:
https://tracker.moodle.org/browse/MOBILE-3471
Cheers,
Dani
We have this issue to fix this:
https://tracker.moodle.org/browse/MOBILE-3471
Cheers,
Dani