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
![](https://uploads-us-west-2.insided.com/klaviyo-en/attachment/341bea40-fc6b-4c13-bfde-dec2582372ca.png)
Best answer by David To
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