hello all I had to learn this the hard way. When you connect to the box and try to obtain the xml file to reset the password it's not going to work unless the box is connected to a switch or a device with internet connection. I faced the same issue and tried it in the office with internet connection and it worked. Somehow some way it probably connects to Hikvision server to generate the xml for a password reset. So when try with a direct connection to the dvr or Nvr without internet it will keep giving you an error. Hope this helps.