The server was unable to process the request due to an internal error – plugin registration tool

The other day my plugin registration tool suddenly stopped connecting to my CRM server and was getting below error

Unhandled Exception: System.ServiceModel.FaultException: The server was unable to process the request due to an internal error

Below steps helped me to resolve the issue

• Go to “Plugin Registration Tool” physical folder
  • Delete existing “Microsoft.Crm.Sdk.Proxy.dll” and “Microsoft.Xrm.Sdk.dll”
  • Get back the 2 .dlls either from CRM SDK or from “C:\Program Files\Microsoft Dynamics CRM\Server\bin” path of CRM server machine
  • Paste them in “Plugin Registration Tool” folder
• Reset the IIS
• Open the Plugin Registration Tool and try to connect to the server

:)