Hi Joe,
I have tried to implement some of the things mentioned in threads related to Restart Server.  I'm still doing it the wrong way since it won't work.
I have done test and announce successfully so i am fairly certain the plugin is loaded correctly.  In addition to Oxide.Reload I have tried restarting the server.
When I use /guia nextrestart I get the message "A Restart has not be scheduled".  When I use /guia suspendrestart i get a similar message.  I also do not get notifications of a restart nor an actual restart. Yes I know it is really a stop.  I have an Event trigger on my server to backup and start in the event of a shutdown.

Here is the section of related json with the change you mentioned to khan.  Yes I am using the latest version of the plugin.

  "Public Restart Announcements": {
    "Enabled":true,
    "Announce With Time Left (HH:MM:SS)": [
      "12:00:00",
      "11:00:00",
      "10:00:00",
      "09:00:00",
      "08:00:00",
      "07:00:00",
      "06:00:00",
      "05:00:00",
      "04:00:00",
      "03:00:00",
      "02:00:00",
      "01:00:00",
      "00:45:00",
      "00:30:00",
      "00:15:00",
      "00:05:00"
    ],
    "Banner Color": "Grey",
    "Cancelled Scheduled Restart Text": "The restart in {time} has been cancelled.",
    "Enabled": true,
    "Restart Announcement Text": "Restarting in {time}",
    "Restart At (HH:MM:SS)": [
      "05:00:00",
      "23:00:00"
    ],
    "Restart My Server": true,
    "Suspended Restart Text": "The restart in {time} has been suspended.",
    "Text Color": "White"
  },
  "Third Party Plugin Support": {
    "Do Not Overlay LustyMap": false,
    "LustyMap Position (Left/Right)": "Left"
  }​

Ok.  Maybe never mind.  I just got a banner "Restart in 6 hours".  Yeah!!!!  Now lets see if it restarts 😁

It's possible that the time of the machine the server is running on is just not what you expected? So the announcements wouldn't have come up when you expected etc.

Your config section looks all fine to me though!

Yes.  That was part of it.  UTC vs PST LOL.  I had to guess the syntax to add the Enable:true at the very beginning of that section.  I will know for sure if it does a shutdown in 45 min.
Also though, am i correct that when you schedule a restart through the config file, that /guia nextrestart and /guia suspendrestart and resumerestart do not work?  Those commands are only for a manually scheduled restart?

Merged post

Flawless!

Those 3 commands should work for config and command restarts.

Also there's already and Enabled setting in that section:

"Cancelled Scheduled Restart Text": "The restart in {time} has been cancelled.",
  "Enabled": true,
  "Restart Announcement Text": "Restarting in {time}",