1885002 Invalid Custom Audience Value

You tried to attach a Custom Audience to the `included_custom_audiences` array that mathematically doesn't exist, was deleted by another user, or belongs to an unlinked Business Manager.

What causes this error?

You tried to attach a Custom Audience to the included_custom_audiences array that mathematically doesn’t exist, was deleted by another user, or belongs to an unlinked Business Manager.

How to fix it

Double-check the Audience ID in your payload. Also, ensure the Ad Account actually has permission to view this audience (if it’s being shared across Business Managers via the ‘Share Audience’ feature).