Have you published a privacy policy for your app?
If not you won’t be able to upload it until that has been done.
It doesn’t matter if it’s an APK or AAB file.
It’s also saying you’ve used the version code – add a .1 to it if it’s a small change, or a full 1 if it’s a major update.
If you change the version and try again it should just give you the privacy error. Put the policy together and you’ll be back on track.