unknown error (375) for Huawei MediaPad M5 8.4 wifi model

[rara7886]

unknown error (375) for Huawei MediaPad M5 PRO

I have already bought it.
Any help please !!!

Check account status
User : rara7886
Credits left : 4
Activated features:
Software debugger
================================================== =================
DC - Unlocker 2 Client 1.00.1403
Detecting phone :
selection :
manufacturer - Huawei phones
model - Auto detect (recommended)
Found Applications port COM6
Model : Huawei HiSilicon Kirin Android phone (new)
Serial NR. :
Firmware : System 8.0.0.173(C635)
================================================== =================
Reading bootloader code...
unknown error (375)

[Valdemaras]

Refund completed. Your device runs android version which is not supported yet.