If you have an audience integration that is showing a fault, you can view the reason for the fault and resume sending data using the following steps.
Navigate to the Setup/Output/Audiences section. This will let you view the audience integration, its connected audiences, and the fault.
Select the connection you want to un-fault and hover over the fault icon. A modal window will popup showing information on the fault and containing a button to Resume the audience connection. Click Resume and the connection will resume sending data.
To learn more about audiences, please visit our docs.