Error: Advertiser permission on a Page
This error comes from Meta and means your Facebook user doesn't have the Advertiser role (or higher) on the Page linked to the ad set. Ask the Business Manager admin for the Page to add you: at business.facebook.com, go to Business Settings, Pages, select the Page, click Add People, and grant your email the Advertiser role or higher. After that, click the Reprocess button on the ads that failed. If the error mentions permission for the action and the account has a pending payment, the system shows a message pointing to the billing problem. In that case, settle the ad account's payment in Meta before trying again.