UFi mi 9t bootloader lock write eng rom with ufi box error.please help

[alihokm]

Firmware package: ENG FIRMWARE XIAOMI Redmi K20 - Mi 9T erase NV [EasyFileSupport.Com]
Scanning for Qualcomm HS-USB QDLoader 9008 device...
Download Port: Qualcomm HS-USB QDLoader 9008 (COM20)
Connection status: XHCI:HUB3[#3]:USB 2.10 High-Speed
USB Device: [Qualcomm CDMA Technologies MSM] QUSB_BULK_CID:040F_SN:FC67AA36
USB Driver: [Network Connect] bmusbser, version: 3.0.0.0, date: 2-5-2018
Initializing...
MSM Serial number: 0xfc67aa36
MSM HW ID: 0x000e60e1 (SM7150), OEM ID: 0x0072 (Xiaomi), MODEL ID: 0x0000
OEM Public Key Hash: 1bebe3863a6781db4b01086063007334de9e5ca14971c7c4f4358ec9d79cda4692ce5e948c6fd409408f4c919fcadfe3
SBL SW version: 1
Firehose: prog_ufs_firehose_sdm855_ddr.elf
hash: d5a6f389faa6828535fe9afd92131bedd749dc5c, size: 652.45 KiB
oem version: c4-miui-ota-bd20.bj
qc version: BOOT.XF.3.1-00172-SM6150LZB-1
variant: SDM7150LA
Loading firehose... Done
Handshaking...
Sending ping... Done
INFO: Binary build date: Jun 5 2019 21:10:42
INFO: Chip serial num: 4234652214 (0xfc67aa36)
Sending configurations...
Requesting flash signature from server...
[SERVER] Error: Invalid flash config!
To avoid authentication problems, please identify with the official firmware and then flash with the factory firmware !
ERROR: Only nop and sig tag can be recevied before authentication.
[SERVER] Error: Invalid flash config!
To avoid authentication problems, please identify with the official firmware and then flash with the factory firmware !