FAQ #25106, published on 2023-11-06
How to fix an "your apps is still using Billing Library Play (PBL) version 4" error when add an Android App on Google Play Store ?
The full error message will be:

One or more of your apps is still using Billing Library Play (PBL) version 4.



An update is available for Android Framework. This update applies to version 28 "Update 3" (280095G).