Integrating Stripe with Firestore to Update Subscriptions Results in Error 404 via Zapier

I am working on an integration between Stripe and Firestore via Zapier with the goal of updating subscription records within my Firestore collection. However, when the Zap is triggered to update a subscription document after a change in Stripe, I am consistently facing a "Failed to create a record in Firebase / Firestore Error code 404: 404 Not Found".cancelled

Here's a rundown of the process and the stumbling blocks I've encountered:

1. I have a Zap set up that listens for updates from Stripe subscriptions and is intended to reflect these changes in the Firestore collection.cancelled
2. The Firestore path seems to be correctly defined (e.g., ), utilizing the dynamic document ID that comes from the Stripe trigger.cancelled/{documentId}
3. I've confirmed that Firestore security rules allow for write permissions on the collection for authenticated services, and the authentication for Zapier is in place.cancelled
4. No additional API key is being used since authentication with existing credentials has been sufficient for other document creation tasks.

Despite the above, the update action fails with a 404 error, suggesting the targeted document could not be found or the path is incorrect. I need assistance in troubleshooting this issue to achieve seamless synchronization between Stripe subscription updates and Firestore records.

Any insights or suggestions to resolve this error and streamline the Stripe-Firestore data flow would be greatly appreciated.

Thank you for your support!