integration magento2 with Klaviyo error happen :
Your Magento 2 integration's periodic sync has failed. Klaviyo is no longer able to authenticate with Magento 2.
klaviyo/magento2-extension version: 2.0.0
magento version: 2.1.9
Best answer by David ToView original
Welcome to the Klaviyo Community!
Are you by chance looking for assistance related to your Magento integration? If so, you may want to reach out and speak with our awesome Support colleagues to work alongside and dig further into the issue.
Since your screenshots appears to show you’re having a periodic sync issue caused by Klaviyo no longer being able to authenticate, in my experience, this is often caused by some missing permissions, a change in usernames/passwords, or even an oauth handshake issue. I would suggest reviewing areas including the following Help Center articles to see if they help!