DraftOrderCalculate access denied

[travis-ENL]

I'm receiving this error when trying to run the following GraphQL mutation:

{
   "query":"mutation draftOrderCalculate($input: DraftOrderInput!) { draftOrderCalculate(input: $input) { userErrors { field message } calculatedDraftOrder { totalTax } } }",
   "variables":{
      "input":{
         "lineItems":[
            {
               "variantId":"gid://shopify/ProductVariant/40512334692549",
               "quantity":1,
               "appliedDiscount":null
            }
         ],
         "shippingAddress":{
            "firstName":"Eduard",
            "lastName":"...",
            "address1":"...",
            "address2":"...",
            "phone":"123",
            "city":"Miami",
            "countryCode":"US",
            "provinceCode":"FL",
            "zip":"123"
         },
         "billingAddress":{
            "firstName":"Eduard",
            "lastName":"...",
            "address1":"...",
            "address2":"...",
            "phone":"123",
            "city":"Miami",
            "countryCode":"US",
            "provinceCode":"FL",
            "zip":"123"
         },
         "email":"eduard@example.com"
      }
   }
}

Error:

{
    "data": {
        "draftOrderCalculate": null
    },
    "errors": [
        {
            "locations": [
                {
                    "column": 58,
                    "line": 1
                }
            ],
            "message": "DraftOrderCalculate access denied",
            "path": [
                "draftOrderCalculate"
            ]
        }
    ],
    "extensions": {
        "cost": {
            "actualQueryCost": 10,
            "requestedQueryCost": 10,
            "throttleStatus": {
                "currentlyAvailable": 990,
                "maximumAvailable": 1000.0,
                "restoreRate": 50.0
            }
        }
    }
}

My private app the write_draft_orders scope  (screenshot).

All app permissions: read_products,write_products,read_orders,write_orders,write_order_edits,read_collection_listings,read_shipping,write_shipping,read_draft_orders,write_draft_orders

[travis-ENL]

This doesn't make any sense. 

{ draftOrders(first: 10) { edges { node { id } } } }

Returns: Access denied for draftOrders field.

I deleted the custom app and re-installed it, verified that the oAuth URL generated included the correct scopes for draft orders, and the app summary clearly says that I will be granting the app permission to edit draft orders. But I get the access denied error. 

I installed the Shopify GraphiQL app and granted it permission to edit draft orders, and it works. 

My app can access orders through, but not draft orders. 

{ orders(first: 10) { edges { node { id } } } }

[travis-ENL]

Ok - I did make a mistake, I didn't update the API token when I uninstalled the app and re-installed it. 

Deleting the app, and re-installing from scratch was required for some reason though.