Samsung G928F with an active Google Account. Apparently fixed by Reset FRP option in Z3X Software. But the problem is that you can’t restart or shut down the phone, because it shows a red message "Custom binary blocked by FRP Lock" and the phone doesn’t start
After a few days trying to fix this problem finally I found the solution. Is so easy that now seems funny!!!!!!!!!!!!!!
Put your phone in Download Mode and perform FRP Reset with Z3X or any other tool. Now your phone start and you can get access to all the functions.
Now the "Magic solution", just go to "DEVELOPER OPTIONS" in Main Menu and select an activate "OEM Unlock"
Now your phone start normally and the problem is gone.