PhoneGap has announced that they will stop PhoneGap development and discontinue the PhoneGap Build service on October 1, 2020.
We are currently reviewing existing alternatives to PhoneGap Build so that WP-AppKit users can build their native Android Apps with other services.
A WP-AppKit update will be made in the coming weeks so that WP-AppKit apps can be exported in other formats than only PhoneGap Build format. One of the new WP-AppKit exports will be the native Cordova tools, so that apps can be built manually without any external service.
Progressive Web Apps are not impacted and you can still build PWAs with WP-AppKit as usual.