[A license can be used on several phones?]

Waiting a few hours and clearing the G play store did solve the issue. Thanks!

[A license can be used on several phones?]

Thanks Andre. I indeed followed the very same workflow you mentioned:

30 minutes ago, andrewilley said:

The Unlocker should be available for you to install from your list of previously-used apps. Launch the Google Play Store app, then go into your profile > My Apps & Games > Library tab. Then find and Install 'Poweramp Full Version Unlocker' from the list.

Andre

And I get the very same error message I mentioned in my report.
Please find the snapshots in attachment for reference.

[A license can be used on several phones?]

I purchased the unlocker in G play but I can't install it on another device using G play and the same account. I only get to "1-tap" purchase it again and be signaled that I "already own it".