THE RPC Server is unavailable on a Domain Controller

One of below can help:

- set the Virtual Disk Service (VDS) to Automatic

- enable these rules in Windows Firewall with Advanced security

• Remote Volume Management - Virtual Disk Service (RPC)
• Remote Volume Management - Virtual Disk Service Loader (RPC)
• Remote Volume Management (RPC-EPMAP)

- ensure that these services are runing and set to Auto start

Windows Management Instrumentation

TCP/IP NetBIOS Helper 

Remote Procedure Call (RPC)