Back in stock email integrate with Klaviyo

Topic summary

Issue: A developer’s back‑in‑stock notification app integrates with Klaviyo via API key, but all back‑in‑stock campaigns triggered from Klaviyo are getting canceled after testing.

Context: The goal is to send back‑in‑stock emails through Klaviyo (a third‑party email platform). No error messages, configuration details, or logs were shared. No code or images are attached.

Status: The thread is a request for help; no solutions or follow‑ups are provided. The cause of the campaign cancellations is unknown, and guidance is sought on how to prevent Klaviyo from canceling these back‑in‑stock sends. Unresolved/ongoing.

Summarized with AI on December 18. AI used: gpt-5.

I am developing an app for back-in-stock notifications and sending emails through a third-party app, Klaviyo. However, after integrating the API key and testing it, all the back-in-stock campaigns sent from Klaviyo are being canceled. Could anyone provide a solution for me?