Customer.io Common Errors Overview Diagnose and fix the most frequent Customer.io integration errors: API status codes, SDK exceptions, delivery failures, campaign trigger issues, and transactional message problems. Prerequisites - Access to Customer.io dashboard - API credentials configured - Access to application logs HTTP Status Code Reference | Code | Meaning | Retryable | Action | |------|---------|-----------|--------| | | Success | N/A | No action needed | | | Bad Request | No | Fix request payload — see details below | | | Unauthorized | No | Check API credentials | | | Forbidden | No…