huawei p20 lite imei repair error via chimeratool

does anyone know the solution ?

Repairing IMEI(s)...
Searching for manufacture port...
Testing connection...
Checking IMEI(s)...
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: [10.01.18 13:58:00]
WorkID: 45058878