The DN specified as the partition base is outside of the namespaces supported by the proxy server instance.
User response
Check the values of the ibm-slapdSuffix attribute in the proxy server configuration for the ibm-slapdProxyBackend entry that define the namespaces supported by the proxy server for this instance. The partition base DN must be included in one of these namespaces. Supply a different value for the base DN on the command line or correct the proxy server's configuration to include a new namespace for the base DN.