Had shop working before the update but after the update, I get this: You may not use the chat shop. You might need to find the NPC Shops.  Not sure what to do.

{
  "Message - Bought": "You've successfully bought {0}x {1}",
  "Message - Error - Building Blocked": "You cannot shop while in building blocked area.",
  "Message - Error - Command Multiple": "Can't buy multiple",
  "Message - Error - Cooldown": "This item has a cooldown of {0} seconds.",
  "Message - Error - Cooldown Amount": "This item has a cooldown and amount is limited to 1.",
  "Message - Error - Invetory Full": "Your inventory is full.",
  "Message - Error - Invetory Slots": "Your inventory needs {0} free slots.",
  "Message - Error - Item Doesnt Exist": "WARNING: The item you are trying to buy doesn't seem to exist",
  "Message - Error - Item Not Set Properly": "WARNING: The admin didn't set this item properly! (item)",
  "Message - Error - Item Not Valid": "WARNING: It seems like it's not a valid item",
  "Message - Error - No Action In Shop": "You are not allowed to {0} in this shop",
  "Message - Error - No Action Item": "You are not allowed to {0} this item here",
  "Message - Error - No Buy Price": "WARNING: No buy price was given by the admin, you can't buy this item",
  "Message - Error - No Chat Shop": "You may not use the chat shop. You might need to find the NPC Shops.",
  "Message - Error - No Econonomics": "Couldn't get informations out of Economics. Is it installed?",
  "Message - Error - No NPC": "The NPC owning this shop was not found around you",
  "Message - Error - No Sell Price": "WARNING: No sell price was given by the admin, you can't sell this item",
  "Message - Error - No Shop": "This shop doesn't seem to exist.",
  "Message - Error - Not Enough Items": "You don't have enough of this item.",
  "Message - Error - Not Enough Money": "You need {0} coins to buy {1} of {2}",
  "Message - Error - Not Nothing": "You cannot buy nothing of this item.",
  "Message - Error - Redeem Kit": "WARNING: There was an error while giving you this kit",
  "Message - Sold": "You've successfully sold {0}x {1}",
  "Shop - Balance": false,
  "Shop - Shop Categories": {
    "Scrap": {
      "buy": "1",
      "img": "https://rustlabs.com/img/items180/scrap.png",
      "item": "scrap",
      "sell": "1"
    },
    "M249": {
      "buy": "3000",
      "img": "https://rustlabs.com/img/items180/lmg.m249.png",
      "item": "m249",
      "sell": "1500"
    },
    "Red Keycard": {
      "buy": "250",
      "img": "https://rustlabs.com/img/items180/keycard_red.png",
      "item": "red keycard",
      "sell": "125"
    },
    "Blue Keycard": {
      "buy": "100",
      "img": "https://rustlabs.com/img/items180/keycard_blue.png",
      "item": "Blue keycard",
      "sell": "50"
    },
    "Stones": {
      "buy": ".005",
      "img": "https://rustlabs.com/img/items180/stones.png",
      "item": "stones",
      "sell": ".0005"
    },
    "Metal Fragments": {
      "buy": ".05",
      "img": "https://rustlabs.com/img/items180/metal.fragments.png",
      "item": "metal fragments",
      "sell": ".005"
    },
    "Gun Powder": {
      "buy": ".5",
      "img": "https://rustlabs.com/img/items180/gunpowder.png",
      "item": "gun powder",
      "sell": ".05"
    },
    "Spawn Car To You": {
      "buy": "500",
      "cmd":[
      	"spawncar $player.id"
      ],
      "img": "https://assets.umod.org/images/icons/plugin/5b63bf46b5d62.jpg",
      "cooldown": "1",
      "sell": "0"
    },
    "Spawn Boat To You": {
      "buy": "500",
      "cmd":[
      	"spawnboat $player.id"
      ],
      "img": "https://www.x.io/data/resource_icons/0/111.jpg",
      "cooldown": "1",
      "sell": "0"
    },
    "Spawn Rhib To You": {
      "buy": "1500",
      "cmd":[
      	"spawnrhib $player.id"
      ],
      "img": "https://www.corrosionhour.com/wp-content/uploads/2018/06/20180622235055_1.jpg",
      "cooldown": "1",
      "sell": "0"
    },
    "Spawn Hot Air Balloon To You": {
      "buy": "500",
      "cmd":[
      	"SpawnMyHotAirBalloon $player.id"
      ],
      "img": "https://www.corrosionhour.com/wp-content/uploads/2018/11/Screenshot-1277.png",
      "cooldown": "1",
      "sell": "0"
    },
    "Mining Quarry": {
      "buy": "2000",
      "img": "https://rustlabs.com/img/items180/mining.quarry.png",
      "item": "mining quarry",
      "sell": "1000"
    },
    "Survey Charge": {
      "buy": "200",
      "img": "https://rustlabs.com/img/items180/surveycharge.png",
      "item": "survey charge",
      "sell": "100"
    },
    "Smoke Grenade": {
      "buy": "10",
      "img": "https://rustlabs.com/img/items180/grenade.smoke.png",
      "item": "smoke grenade",
      "sell": "5"
    },
    "Coffin": {
      "buy": "200",
      "img": "https://rustlabs.com/img/items180/coffin.storage.png",
      "item": "coffin",
      "sell": "100"
    }
  },
  "Shop - Shop Icon Url": "",
  "Shop - Shop List": {
    "chat": {
      "buy": [
        "Scrap",
        "Mining Quarry",
        "M249",
        "Stones",
        "Metal Fragments",
        "Gun Powder",
        "Red Keycard",
        "Blue Keycard",
        "Spawn Car To You",
        "Spawn Boat To You",
        "Spawn Rhib To You",
        "Spawn Hot Air Balloon To You",
        "Survey Charge",
        "Smoke Grenade",
        "Coffin"
      ],
      "description": "You currently have {0} coins to spend in this Rusty Paradise Market",
      "name": "Rusty Paradise Market",
      "sell": [
        "Scrap",
        "Mining Quarry",
        "M249",
        "Stones",
        "Metal Fragments",
        "Gun Powder",
        "Red Keycard",
        "Blue Keycard",
        "Survey Charge",
        "Smoke Grenade",
        "Coffin"
      ]
    }
  }
}​

Merged post

Is there someplace I can find the last version of the plugin because that one worked for me?

The error is that we have not split your configuration config and it's going normal

You have an outdated configuration file. 
Delete it and reload the plugin for the new one.