Error when using ACL command — gsutil acl ch -u AllUsers:R gs://storage-gcp-user123/BG.doc error Please ensure you have OWNER-role access to this resource.

gsutil acl ch -u AllUsers:R gs://storage-gcp-user123/BG.doc

CommandException: Failed to set acl for gs://storage-gcp-user123/BG.doc . Please ensure you have OWNER-role access to this resource.