A Meta custom conversion is not usable until its underlying event or URL rule receives valid activity and the ad account has access to the data source. Check the source event first, then the conversion rule and ad-set objective.
Check the exact status first
In Events Manager, open Custom conversions and check its status, rule, event source, and whether the linked event has been received.
Fix it in Meta Events Manager
Follow these steps in order. If a setting is locked, stop and check the account role or asset ownership before rebuilding the campaign.
- Confirm the custom conversion uses the correct dataset.
- Review the URL rule or event rule for exact spelling and matching conditions.
- Trigger the real thank-you page or action on the live site.
- Confirm the source event appears before expecting the custom conversion to activate.
- Return to the ad set and match the conversion location and optimization setting to the custom conversion.
Verify before changing the campaign again
Use a fresh status check after saving. Avoid raising the budget, changing the audience, and replacing the creative until the original issue has cleared.
- Check that the conversion status is active or eligible.
- Test from the same domain and path used in the rule.
- Do not change the rule and campaign at the same time.
THE TAKEAWAY
Fix the stated error first, then change only one campaign variable at a time so you can see what actually resolved it.