Error "Cannot read properties of undefined (reading 'webhookSubscriptions')" at webhook creation

[igortavtib]

 I am trying to create a webhook with topic INVENTORY_LEVELS/UPDATE but I am getting the error "Cannot read properties of undefined (reading 'webhookSubscriptions')" at the creation. I've already checked my app scopes and I have the read_inventory scope.

 This is my current code:

async function registerRestockHook( session ) {
  const hook = await Shopify.Webhooks.Registry.register({
    shop: session.shop,
    accessToken: session.accessToken,
    topic: 'INVENTORY_LEVELS/UPDATE',
    path: '/webhooks',
    webhookHandler: async (topic, shop, body) => {
      console.log(body);
    }
  });

  if (!hook["INVENTORY_LEVELS/UPDATE"].success) {
    console.log(
      `Failed to register INVENTORY_LEVELS/UPDATE webhook: ${response.result}`
    );
  }
}

[awwdam]

Hey @igortavtib, 

I took a closer look at your question and the details shared. I found a few other examples of similar errors that mention this was resolved after updating app permissions.

• Have you attempted changing (updating) granted scopes for the specific store? 

If so, and this issue has persisted, I wanted to ask a few more questions.

• Have you worked through any debugging with an API client? I was able to register a subscription with both a REST post request and GraphQL mutation, neither has issues when the app had the correct scope access (read_inventory).
• Can you register other subscriptions with the same app?
  
  

Though I am not personally full-time node.js developer, I have successfully implemented webhooks into several of my test applications that are built with the shopify-node-api library - using this documentation. 

Beyond that, if you are able to replicate this behaviour and can log an x-request-id response header value returned with the error, I can absolutely investigate logs on our end, pass back insights, suggestions, or next steps!

- Cheers

[igortavtib]

Hi @awwdam,

After making some tests and rewriting the code I could successfully create the webhook. I actually don't know what exactly was wrong with my first code but now it works.

Thank you for your answer and I am sorry I've not updated this post before.