htc desire 10 pro s-off problrem

1. Checking phone connectivity.......
Phone connection confirmed!
HTC KEY CARD VERSION: 7
2. Checking Server connectivity...
Server connection confirmed!
3. Checking PowerAdapter connectivity...
PowerAdapter connected, processing request to adapter...
Process started
Starting operation...
Sending oem writesecureflag 0
... (bootloader) HTC KEY CARD VERSION: 7
Building connection
Initiating communication
Building connection
Data exchange sequence.
Request sent, waiting for reply ... 2 second(s)
Processing...
Data exchange completed
Data exchange sequence.....
Initiating communication
Building connection
Data exchange sequence.
Request sent, waiting for reply ... 1 second
Processing...
Data exchange completed
Data exchange sequence.
FAILWRITE SECURE FLAG ERROR (11)
FAILED (remote: WRITE SECURE FLAG ERROR (11))
finished. total time: 17.804s
htc_fastboot finished
Initiating communication
Operation completed!
Releasing adapter.
Request completed



now what can i do for s-off this phone ?