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      "Unauthorized" error when pushing images to ACR with Service Principal account

      Affected versions: 2.13.0 and above

      Fixed in: Upcoming release

      Issue Description

      Users are unable to push images to the Azure Container Registry.  The following error appears:

      `Unauthorized: authentication required, visit https://aka.ms/acr/authorization for more information."},"error":"unauthorized: authentication required, visit https://aka.ms/acr/authorization for more information."}`

      Cause

      This issue is the result of using Service Principal accounts in the Azure Container Registry configuration in Portainer.

      Workaround

      You will need to configure your Azure Container Registry using the Access Key (Admin) account.