Our website recently had its regular monthly update, following which, I received a few emails from Klaviyo that Klaviyo is no longer authorized to connect to WooCommerce. This is strange as the website is still showing the plug in is activated, and I’m still able to subscribe to the email list from the website.
If everything’s connected and running fine, why am I still getting this alert email from Klaviyo?
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Klaviyo connects to WooCommerce using the REST API keys you generated when you set up the integration.
After a WordPress / WooCommerce / security plugin update, any of the following can happen:
WooCommerce sometimes resets or disables API keys during updates.
This causes Klaviyo to briefly lose access → Klaviyo sends an alert → connection later resumes.
Even a momentary block triggers Klaviyo’s “lost authorization” email.
This also causes Klaviyo to think it’s unauthorized, even though it reconnects when your site finishes the update.
The Klaviyo plugin showing as active doesn’t guarantee the REST API authentication behind it is still valid.
Go to Klaviyo → Integrations → WooCommerce
See if it shows a green “Connected” checkmark.
If it shows an error, reconnect WooCommerce by re-entering your site URL and regenerating API keys.
Check if any security plugin recently blocked API traffic.
Watch for repeated alert emails — one time = normal, recurring = needs fixing.
A single email right after a site update is normal and not a sign of a real problem.
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.
