If you use a rooted device, ensure it is Play Protect Certified . Uncertified devices may fail mandatory license checks.
A lack of internet connectivity or background data restrictions can prevent the initial or periodic license check. fpse license check failed exclusive
If the app was installed from an external source (sideloaded), the license check will fail by design. Uninstall the current version of FPse. If you use a rooted device, ensure it
Cached data within the Play Store app can become corrupted, preventing it from communicating correctly with licensing servers. If you use a rooted device