P20 frp ???

hi i have a p20 with frp on support i must enable adb
but how ?
i tried on fastboot mode
SigmaKey 2.28.03b1 HiSi: Remove FRP / Huawei ID
Phone model: EML-L09
Version: :EML-L09 8.1.0.129(C109)
Internal error 0666
please any help