Error: Your attribution model couldn't find any GA4 session data. This usually happens when your filters are too restrictive.
What you need to do:
Review your filter configuration - Go to your attribution model settings and check all active filters.
Check filter logic - Remember that multiple filters are combined with "AND", so all conditions must be met. If you have many filters, they may exclude all sessions.
Temporarily remove or relax filters - Try removing filters one by one to see which one is causing the issue, or widen the filter criteria.
Why this happens:
When you add multiple filters (e.g., multiple countries), they're combined with "AND". If the combination is too narrow, it can result in zero sessions matching all conditions.