huawei dra-l01 unlock failed help please

SigmaKey 2.29.18 MTK: Direct unlock (Huawei DUA-###)
Removing firmware protection.....OK
Baseband Processor:MT6739, HW Rev. B.00, SW Rev. 0.02
Testing external RAM...DRAM, 2 Gb
Detecting flash...eMMC, Flash size: 14.69 Gb
Phone model: HUAWEI DRA-L01
Android 8.1.0
Firmware: "DRA-L01-user 8.1.0 HUAWEIDRA-L01 1.0.0.104(C346) release-keys"
Software IMEI: 868166031720972
Reading security block...File I/O operation failed