MC4SF_LICENCE_UPDATE_API

What this means: Mailchimp for Salesforce could not send updated licence usage numbers to Beaufort 12. Sync can keep running, but billing usage may not refresh until the next successful update.

What to do: Wait for the next scheduled licence refresh. Confirm outbound access to Beaufort 12 is not blocked. If it persists more than a day, contact Beaufort 12 support.