EconomyGooglePlayStorePurchaseFailedException

Hi, since I migrated my project from one Google Play project to another (because I changed the package name), the IAP does not work anymore.

I already updated the Google Play Public Key in the project’s Unity dashboard and in the editor in the IAP settings.

When performing an IAP I always get the following error:
“EconomyGooglePlayStorePurchaseFailedException: Purchase receipt invalid, see data field for full detail”.
ErrorCode: 10507
data.verification.status: INVALID_VERIFICATION_FAILED

Anybody having any idea what I did miss during the project migration?

Nobody has an idea or similar problems with the newest version of Economy?
This problem is really holding me back to publish my game and I have no clue whats wrong.

Data field has no further information besides the verification status by the way (only purchase rewards and the underlying app store).