My OPCUA node suddenly don't work with the “End point must exist opc.tcp://GCS:4862” issue

I use the node-red-contrib-opcua node to connect the WinCC OPCUA, it works just fine until last night the Windows get itself updated. This morning I start my flows and find my node can`t connect the Wincc OPC UA .

the error shows like below:

25 Sep 11:53:11 - [error] [OpcUa-Client:Wincc for OPC] Client node error on: Wincc for OPC error: ["Wincc for OPC OPC UA connection error:  End point must exist opc.tcp://GCS:4862"]
Client node error on: Wincc for OPC error: ["Wincc for OPC OPC UA connection error:  End point must exist opc.tcp://GCS:4862"]

This is my situation:

  1. I build a local WinCC project to run the OPCUA,I started the WinCC project, and I can connect the OPC from UAExpert
  2. But in the Node-Red I just can connect the OPC
  3. I used the PING node link the debug node ,and it returned "1"