Can't reboot hass.io from command line or from the service menu

I can login SSH with no problem. When I run ‘hassio host reboot’, I get this:

core-ssh:~# hassio host reboot
{
“result”: “error”,
“message”: null
}

When I run ‘hassio host shutdown’, I get this:

core-ssh:~# hassio host shutdown
{
“result”: “error”,
“message”: null
}

When I call reboot from the service menu, it says it call it. Then this shows up in the log:

2018-05-21 09:17:02 ERROR (MainThread) [homeassistant.components.hassio] Error on Hass.io API: None

Any help or thoughts would be greatly appreciated!

Tried the command line reboot again adding the debug switch:

core-ssh:~# hassio -d host reboot
DEBUG [CmdHost]: action->‘reboot’, endpoint=‘reboot’, serverOverride->’’, GET->‘false’, options->’’, rawjson->‘false’, filter->’’
DEBUG [ExecCommand]: basepath->‘host’, endpoint->‘reboot’, serverOverride->’’, get->‘false’, Options->’’, Filter->’’, RawJSON->‘false’
DEBUG [GenerateURI]: basepath->‘host’, endpoint->‘reboot’, serverOverride->’’
DEBUG [RestCall]: data->‘http://hassio/host/reboot’, GET->‘false’, payload->’’
DEBUG [RestCall]: ResponseBody->’{“result”: “error”, “message”: null}’
{
“result”: “error”,
“message”: null
}

Did you every figure this out?
I have the exact same problem.

No. I was never able to figure it out. I did a fresh install of the newest Hass.io at the time and have not had the problem since. Also, I have had better luck overall using Firefox versus other browsers.