they changed it how it works,
first plug in your Phone and then turn it off , it will charge while its off
i read somehwere that google wanted that every phone boots up when pluged in , it should be security feature or something like that
there are scripts which helps u to press in the right moment and doenst matter if u got an error, try after everytime u tried get permission to link your account.
Try to link account, the message is coming if u have unlock permission or not
There are scripts which presses at the right moment for you for application, is working for most people