Here is my config:  i get the error:

GUIShop v1.5.9: Failed to load config file (is the config file corrupt?) (Invalid character after parsing property name. Expected ':' but got: ". Path '['Shop - Shop Categories'].BlueBerries', line 44, position 6.)

How fix?

Your config is filled with formating errors etc.

You should use a json editor or at least a json validator.

{
	"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": {
		"Apple": {
			"buy": "1",
			"item": "apple",
			"sell": "1"
		},
		"Assault Rifle": {
			"buy": "10",
			"item": "assault rifle",
			"sell": "8"
		},
		"BlueBerries": {
			"buy": "1",
			"item": "blueberries",
			"sell": "1"
		},
		"MiliTrainee Kit": {
			"buy": "10",
			"item": "kitmilitrainee",
			"sell": "8"
		}
	},
	"Shop - Shop Icon Url": "",
	"Shop - Shop List": {
		"ammunition": {
			"buy": [
				"Assault Rifle",
				"Bolt Action Rifle"
			],
			"description": "You currently have {0} coins to spend in the ammunition shop",
			"name": "Ammunition",
			"sell": [
				"Assault Rifle",
				"Bolt Action Rifle"
			]
		},
		"attire": {
			"buy": [
				"Assault Rifle",
				"Bolt Action Rifle"
			],
			"description": "You currently have {0} coins to spend in the attire shop",
			"name": "Clothing",
			"sell": [
				"Assault Rifle",
				"Bolt Action Rifle"
			]
		},
		"commands": {
			"buy": [
				"Assault Rifle",
				"Bolt Action Rifle"
			],
			"description": "You currently have {0} coins to spend in the commands shop",
			"name": "Commands",
			"sell": [
				"Assault Rifle",
				"Bolt Action Rifle"
			]
		},
		"components": {
			"buy": [
				"Apple",
				"BlueBerries",
				"Assault Rifle",
				"Bolt Action Rifle"
			],
			"description": "You currently have {0} coins to spend in the components shop",
			"name": "Item",
			"sell": [
				"Apple",
				"BlueBerries",
				"Assault Rifle",
				"Bolt Action Rifle"
			]
		},
		"construction": {
			"buy": [
				"Assault Rifle",
				"Bolt Action Rifle"
			],
			"description": "You currently have {0} coins to spend in the construction shop",
			"name": "Construction",
			"sell": [
				"Assault Rifle",
				"Bolt Action Rifle"
			]
		},
		"food": {
			"buy": [
				"BlueBerries"
			],
			"description": "You currently have {0} coins to spend in the food shop",
			"name": "Food",
			"sell": [
				"Apple"
			]
		},
		"items": {
			"buy": [
				"Apple",
				"BlueBerries",
				"Assault Rifle",
				"Bolt Action Rifle"
			],
			"description": "You currently have {0} coins to spend in the items market",
			"name": "Item",
			"sell": [
				"Apple",
				"BlueBerries",
				"Assault Rifle",
				"Bolt Action Rifle"
			]
		},
		"medical": {
			"buy": [
				"Assault Rifle",
				"Bolt Action Rifle"
			],
			"description": "You currently have {0} coins to spend in the medical shop",
			"name": "Meds",
			"sell": [
				"Assault Rifle",
				"Bolt Action Rifle"
			]
		},
		"misc": {
			"buy": [
				"Apple",
				"BlueBerries",
				"Assault Rifle",
				"Bolt Action Rifle"
			],
			"description": "You currently have {0} coins to spend in the misc shop",
			"name": "Item",
			"sell": [
				"Apple",
				"BlueBerries",
				"Assault Rifle",
				"Bolt Action Rifle"
			]
		},
		"resources": {
			"buy": [
				"Assault Rifle",
				"Bolt Action Rifle"
			],
			"description": "You currently have {0} coins to spend in the resources shop",
			"name": "Resource",
			"sell": [
				"Assault Rifle",
				"Bolt Action Rifle"
			]
		},
		"tools": {
			"buy": [
				"Assault Rifle",
				"Bolt Action Rifle"
			],
			"description": "You currently have {0} coins to spend in the tools shop",
			"name": "Tools",
			"sell": [
				"Assault Rifle",
				"Bolt Action Rifle"
			]
		},
		"traps": {
			"buy": [
				"Assault Rifle",
				"Bolt Action Rifle"
			],
			"description": "You currently have {0} coins to spend in the traps shop",
			"name": "Trap",
			"sell": [
				"Assault Rifle",
				"Bolt Action Rifle"
			]
		},
		"weapons": {
			"buy": [
				"Assault Rifle",
				"Bolt Action Rifle"
			],
			"description": "You currently have {0} coins to spend in the weapons shop",
			"name": "Weapons",
			"sell": [
				"Assault Rifle",
				"Bolt Action Rifle"
			]
		},
		"1273529085": {
			"buy": [
				"kitmilitrainee"
			],
			"description": "You currently have {0} coins to give to Elizabeth",
			"name": "Military Trainee Elizabeth ",
			"sell": [
				"Assault Rifle"
			]
		}

	}
}