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Likely cause: Event mapping is misconfigured — the events Upstack sends don’t match the conversion events the destination expects, or required parameters are missing. Fix:
  1. Go to Destinations → click the destination → Event Mapping tab.
  2. Verify that Upstack events are mapped to the correct destination events. For example:
    • Purchase → Meta’s Purchase (not AddToCart)
    • AddToCart → TikTok’s AddToCart (case-sensitive)
    • PageView → GA4’s page_view
  3. Check that required parameters are mapped — most Conversion APIs require event_time, event_source_url, and at least one identity field (email or phone).
  4. For Meta CAPI: open Meta Events Manager → Test Events tab and compare the parameters Upstack sends against what Meta expects.
  5. Save any mapping changes and monitor the event log for the next 15 minutes.
Still stuck? Contact support@upstackdata.com with your Pixel ID and a description of the issue. We typically respond within a few hours.