fail to remove p20 pro frp

i follow all software instructions drivers are installed properly.
software ask to enable RSA key i reboot phone but after phone switch on ADB is not active .


model number: clt-l09

SigmaKey v.2.28.07 build 02
284516612 Sigma dongle 2.28, Initializing...OK
Pack 1: Activated
Pack 2: Activated
Pack 3: Activated
--------- 2018-08-29 09:37:45 ---------
SigmaKey 2.28.07b2 ADB: Remove FRP
^ Android Composite ADB Interface
Cancelled