Some audiences appeared with Error status in the list. What do I do?

Each item in the progress list shows its own status. When something fails, the reason returned by Meta appears in red right below the audience name. The most common errors are: your user lacks permission on the Page, profile, or pixel involved; the retention period is above Meta's limit for that type; an invalid pixel event name; and a lookalike source that is too small. An item with an error doesn't block the others, and the remaining audiences keep being created as normal. Fix the cause shown in the message and click Create Audiences again. Audiences that were already created are recognized by name and aren't duplicated, so only the missing ones are created.