Hi @Viraj_Bankar ,
Since you were successfully moving AEP audiences from the Default workspace to a custom workspace as recently as May 5, 2025, and the error suddenly started, this strongly suggests that something has changed in the environment or backend, not in your process.
Recent Changes in Adobe Admin Console / Permissions
2. AEP–Target Integration Bug or Outage
3. Audience Format or Activation Flow Changed
4. Workspace Configuration Regression