Facebook recently announced some changes to the Graph API. As a result, the App Access Tokens utilised by the existing reporting API will be deprecated on 1 May 2018 and replaced with new System User Access Tokens.
If you're optimising the Facebook Audience Network in mediation, you’ll need to take immediate action to continue using the latest available data.
To update your AdMob and DFP accounts:
- Generate new System User Access Tokens to replace your existing App Access Tokens.
- Retrieve the Facebook App IDs for your apps.
- Use the System User Access Tokens and Facebook App IDs to update the Facebook Audience Network credentials in the mediation section of your AdMob and DFP accounts.