Please ensure you have valid Poweramp purchase from Google Play Store. Other purchase methods won't work for this Unlocker.
To resolve this issue:
1. uninstall Poweramp Full Version Unlocker
2. install Poweramp Full Version Unlocker from Google Play Store app. Reinstalls to the same account are free. Installing Unlocker from APK won't resolve the issue
3. You may need start/wait a bit/exit Poweramp 2 times to reload license state.
Tag: license error #