Why are my campaigns not starting?

I've got a campaign that does not begin, it stays stuck in scheduled. The details are:
  • ID = 8425635f-8fd1-4790-94e2-5155120a26c8
  • earliestAt = Dec 19, 2025, 8:03 PM (GMT)
  • latestAt = Dec 19, 2025, 9:03 PM (GMT)
It was created via API and it has been an hour now. There are no webhook logs, error logs, or anything else that would indicate why it is broken? Is there an issue here?

In general, campaigns seem to be a particular black-box feature of Vapi - they seem to often not work for hidden reasons - it would be great if we could get some additional visibility/logging on campaigns.
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