How to grant Tapcast the required access:
Note: You must be an Admin in your Facebook Business account in order to grant this access. You can identify the Admins in your Business account by the small "shield" icons next to their names in Facebook Business Settings.
1. Go to Business Settings
2. Select the Partners section and click the +Add button.
3. Enter the Tapcast Business ID (301675990172110) and click Next.
4. On the Assign Assets window, select “Ad Accounts,” your ad account, and “View performance.” Click Save Changes to complete the process.