GSM Trial 21.04.5 - can't change default admin password

[dandtech]

Hi all,

GSM Trial 21.04.05 - virtual appliance
Installation process = done OK.

Trouble:

• can’t change the (ssh) admin, default password (the admin/admin).
  I follow the:
  https://docs.greenbone.net/GSM-Manual/gos-5/en/managing-gos.html#fig-gos-menu-adminpassword
  but no matter how complex a password I enter, I’m getting: “Failure Password not changed.”

Thanks