Purchases via NativeStore are no longer working on Android.
refreshItems seems to work, the correct prices are received. But when purchasing I receive an error from Google Play:

"This app version is not configured for payments with Google Play."

I translated it, since the error was in German for me.
I attached the "Publish" output.

The Native Store works fine, please read comments in the native store header.

The only cause could be:

"-with the same Package Name as in the store"

But the app name is the same as I set up in the store, namely "Knights & Snails". But the apk that results from the publish process is changed to "Knights n Snails.apk", but the app title is properly displayed as "Knights & Snails". Could this be the issue here?

But actually the store already worked for me with the last EE2 version, now it's not. Did you check the output.txt for anything suspicious?

Are you compiling this in Release/Publish and not in Debug?
Have you waited a few hours before the app has been submitted to the Play store and updated to the same version as on your computer?
Please google this issue as it is not Esenthel Related.

Release & Publish, yes.
So, everytime I make small changes I have to update the APK on the store? I had it uploaded there under Alpha Test and just updated it. Will test tomorrow if that worked.

Seems to be fixed by making sure you upload always the newest apk to Google Play.