help with P20 lite

hi i have a P20 lite but cant conect to repair imei ... here is the log

Quote:

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: [01.10.19 21:28:02] WorkID: 50750603

thanks for you advance



_Morfy_