vivo y51 format & reset frp failed

Operation : Format FS
Checking for existing devices...Not Found
Turn Off phone, hold Vol UP + Vol DOWN and insert USB cable.
Some phones may need Special Boot Cable or TestPoint for EDL mode.
Found Port : Qualcomm HS-USB QDLoader 9008 (COM5)
Driver Info : Qualcomm Incorporated, qcusbser.sys, 2.1.0.3
Connecting to phone...OK
Waiting for response...OK
Init Handshake Sequence...OK
Hardware ID : E1507000 [8916] 00000000
OPK_DATA : 9CBA94693C2333A562BCF0E0E981C558748817D002F543B2A2 6AB1B4B3F1CF9E
Initializing Protocol...OK
Using Auto Loader Selection [1]
Preparing Loader...Done
Sending Loader [8916_014]...Done
Executing Loader...OK
Detecting Chip Type...OK
Hardware : 8916, eMMC, 16 GB
LU Count : 1 [0x01D5C000]
WARNING! High Speed Driver is not installed.
Please install driver from QcFire\Drivers folder using Device Manager.
Payload Info : In: 65536 [4096], Out: 16384, Sector Size: 512
Reading Partition Table...OK
Reading Device Information...OK
Device : vivo vivo Y51 [msm8916]
Software : LRX22G release-keys, eng.compiler.20160531.220751 [Tue May 31 22:11:48 CST 2016]
Android Ver. : 5.0.2
Patch Level : 2016-05-01
Preparing Data...Done
Formatting Userdata...Failed
Resetting FRP Lock...Failed
Operation Failed.
ErrorLog : PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiID 8+PGRhdGE+
PGxvZyB2YWx1ZT0iUmVhZCBiYWNrIHZlcmlmeSBmYWlsZWQgYX Qgc2Vj
dG9yIDEzNDA1ODUzNzAsbnVtIHNlY3RvcnMgNzMyMjYyNCIgLz 48L2RhdGE+
QcFire Ver. 4.1

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