bulk mutation operation Retrieve the results return null

[johnLoveApp]

I am ready to do batch update according to the instructions

https://shopify.dev/api/usage/bulk-operations/imports#retrieve-the-results

No problem up front. To the query result node returns null

webhook return

{"admin_graphql_api_id":"gid:\/\/shopify\/BulkOperation\/628413137063","completed_at":"2021-11-03T10:50:38-04:00","created_at":"2021-11-03T10:50:35-04:00","error_code":null,"status":"completed","type":"mutation"}

i post get the result

query {
  node(id: "gid://shopify/BulkOperation/628413137063") {
    ... on BulkOperation {
      url
      partialDataUrl
    }
  }
}

But the result keeps returning null

array(2) {
  ["data"]=>
  array(1) {
    ["node"]=>
    NULL
  }
  ["extensions"]=>
  array(1) {
    ["cost"]=>
    array(3) {
      ["requestedQueryCost"]=>
      int(1)
      ["actualQueryCost"]=>
      int(1)
      ["throttleStatus"]=>
      array(3) {
        ["maximumAvailable"]=>
        float(1000)
        ["currentlyAvailable"]=>
        int(999)
        ["restoreRate"]=>
        float(50)
      }
    }
  }
}

myshopify.com/admin/api/2021-10/graphql.json

Can someone help me see why?

[johnLoveApp]

Does everyone encounter this problem?

[Schmidtc63 · Accepted solution]

Ok. I figured this out.

If you use the shopify-graphiql-app to create your webhook, the webhook is created under different credentials than the other webhooks for your store/custom app. 
You have to create the webhook through GraphQL using the credentials of your other webhooks, which most likely means just submitting the webhook creation query as you do your other GraphQL queries.

[makasanas]

@johnLoveApp 

i am facing same problem did you figure out out what is problem here? Here is my same question. 
https://community.shopify.com/c/graphql-basics-and/offline-graphqlclient-returning-null-bulkoperatio...