J120m reset frp error

[ 3/1/2016 6:52:00 PM ] Searching Samsung USB Flash Interface… detected COM28
[ 3/1/2016 6:52:00 PM ] Setup connection… OK
[ 3/1/2016 6:52:00 PM ] Reading PIT from phone… OK
[ 3/1/2016 6:52:00 PM ] Searching FRP lock… OK
[ 3/1/2016 6:52:00 PM ] Erasing FRP… error
[ 3/1/2016 6:52:00 PM ]