I'm trying to upload an app update, but App Store is not allowing. After upload, it just shows, "Problem uploading APK". I made sure:
1. The app is signed with the certificate it was signed during first uploaded
2. The package name is exactly same as the one uploaded earlier.
3. The APK is signed with V1 signature.
4. It is a release build.
We didn't update the app for quite some time. Is that a problem? How to resolve?