i need help to unlock huawei mate 9 mha l09

i get this error on chimera... any help?

Removing network lock...
Searching for manufacture port...
Testing connection...
Authenticating...
This may take a while.
Be patient! Do NOT disconnect the phone!
The device sent an invalid challenge.
Retry 2/5
The device sent an invalid challenge.
Retry 3/5
The device sent an invalid challenge.
Retry 4/5
The device sent an invalid challenge.
Retry 5/5
The device sent an invalid challenge.
Authentication with the device failed.
Finished at local time: [04.22.19 12:13:08]