How to UNLOCK BOOTLOADER NOVA 5T with sigma

hi,
i have 5pack sigma and i need to root the nova 5t so i try to unlock bootloader with sigma in Maufacture Mode but nothing happend!
here is the log

Code:

--------- 2021-02-22 13:48:06 ---------
SigmaKey 2.40.00 HiSi: Get Huawei bootloader password
Connecting...Reboot phone and try again


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