Hydra Redmi Note 7 unlock bootloader plz help

[Dr.dre888]

i have redmi note 7 system has been destroyed
itried to unlock bootloader to flash in edl
but i have problem in signature


Searching for Qualcomm 9008 Device...Found
FriendlyName :Qualcomm HS-USB QDLoader 9008 (COM40)
SymbolicName :\??\USB#VID_05C6&PID_9008#5&2b012f57&0&2#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
Driver Ver :02/05/2018,3.0.0.0

Getting device info......
Serial No.: 0xE759D6BD
HW_ID : 0008C0E100000000
MSM ID : 0x0008C0E1, SDM660-Qualcomm Snapdragon 660
MODEL_ID : 0x0000
OEM_ID : 0x0000 - QUALCOMM
PBL Ver : 00000004
PK HASH : a7b8b82545a98eca23d6e9105fb464568d1b5828264903441bdef0cd57e3c370

Firehose Loader[Redmi_Note_7_lavender_Micron.elf]
--------------------------------------------------
Header Type : OLD
TargetMSM :
Tag : _auth
Version : 5
Code_size : 416
Signature_size : 256
fhVendor : XIAOMI
HW_ID : 3006000000010000
Vendor : GENERIC
OEM_ID : 0001
MODEL_ID : 0000
SW_ID : 000000000000000B
APP_ID :
pk_hash : a7b8b82545a98eca23d6e9105fb464568d1b5828264903441bdef0cd57e3c370
OEM_VERSION : c3-bsp-builder-job007.bj
IMAGE_VARIANT : Sdm660LA
QC_VERSION : BOOT.XF.1.4-00262-S660LZB-1
--------------------------------------------------

SaharaBoot... Ok
Sending .................................Ok
Connecting to Firehose...
Ping......... Ok
Configuration.
Xiaomi Authentication needed...
Signature Request -> bob[89kNiFywMhL24QallKfp4LeYxJW]
Signature @256bytes Authentication.... Denied..
Signature Verification Failed
Running : Failed
Device is not in Firehose Mode

Elapsed Time : 00:00:06