Send historical order data to Klaviyo function fails because of timestamp error

[jornwildenbeest]

The Send historical order data to Klaviyo function fails because of an invalid time format.

Talking about the functionality on the /admin/utilities/klaviyo-connect?site=default page.

The error you eventually get is

{"errors":[{"id":"3ced2596-0046-4011-afc2-41f3be4f9e9f","status":400,"code":"invalid","title":"Invalid input.","detail":"Please provide a valid date in the format YYYY-MM-DD, YYYY-MM-DDTHH:MM:SS, or YYYY-MM-DDTHH:MM:SSZ","source":{"pointer":"/data/attributes/time"},"links":{},"meta":{}}]}

I've made a pull request for the fix: #136

This is only for Craft 4, but I assume the same fix can be implemented for Craft 5