What did you use?
I´ve tried an OpenSSH server on Ubunto 17.04. Not working.
All other problems are like yours with Child object code 1.
Got a case with TAC, but their server gave me the same error (lol).
This is the worse release ever. And I also lost GUI access when trying the reset password function. That removes the original password but doesn´t set it to admin.
Best Airwave week ever!