Check if the flow is activated (if the flow is an automation).
Make sure the flow is set to "ON".
Test Without Blocking Conditions
During testing, ignore waiting times and ensure that no conditions are blocking the flow – see the article "How to Test My Flow".
Check if Your Templates Are "Approved" by Meta
Ensure that your templates have been submitted for Meta approval and are not in draft mode. The status "Approved" should be displayed on all templates after clicking "Submit".
Check your flow settings.
Make sure all steps are correctly connected. (when to use reply)
Check that the flow is logical and that no nodes are isolated. (template in draft, photo or video in the wrong format, error message.
Payment Issues?
If everything looks fine, check your payment methods in the Business Manager settings.