0x803F8001: This App Is Not Licensed for Your Account or This Device
0x803F8001 means the signed-in account holds no entitlement. Check which account the Store is using, then assign a licence that includes the app.
0x803F8001 and 0x803F8003: No Usable Entitlement for the Signed-In Account
0x803F8001 means no entitlement for the signed-in account; 0x803F8003 means the entitlement exists but is in a state that cannot produce a licence.