The most effective community-verified fix for One UI 5 users is to completely remove the Secure Folder.
Go to > Security and privacy (or Biometrics and security). Select Secure Folder > More settings . Choose Uninstall . hex installer apk license error
Open the Play Store and ensure you are logged into the used for the original purchase. The most effective community-verified fix for One UI
On One UI 5 and later, the presence of the Secure Folder often blocks the app's license verification. hex installer apk license error