Overview

Follow this guide to learn more about common Klaviyo error codes that you may encounter and how to troubleshoot these issues.

Common Internal Error Codes:

-1 (Warning):

This code indicates that while the Klaviyo destination did not return an error, there was something unusual about the request.

-100 (Timeout):

This error means there was an attempt to send your event to the Klaviyo destination, but the destination took too long to respond. As a result, we cannot confirm whether the event was successfully received or processed.

-500 (Unexpected Error):

A -500 error signals that something went wrong, but the root cause is unclear. This could be due to a bug in the code or a network error that led to a canceled request.

Understanding Specific Klaviyo Error Codes

Error Code:	Error Code Name:	Details:	Next Steps:
400	BAD_REQUEST	The _kx parameter used for Klaviyo campaigns attribution is either missing, incorrectly formatted or expired.
401	UNAUTHORIZED	A request was not successful because it lacks valid authentication credentials for the requested resource.	Reconnect your Klaviyo account within the Elevar destination settings. Follow this guide to learn how to connect your Klaviyo account.
-500		An error occurred processing the event.	This error usually indicates that something went wrong on Klaviyo's servers, preventing a request from being processed properly. Read the Klaviyo Status Page to check for updates.