OPC server for Arduino

Hey everyone, I have a project in which i ant to communicate between Arduino and Wincc using OPC UA server. I installed OPC server for Arduino from st4makers and I followed all the steps they mentioned but it didn't work for me, when I open KEPServer to add items I have in my code Arduino, i found nothing.
my info tab in the server: (normally it should show that the opc is waiting for the client to connect, but nothing here)

if there are any suggestions , I will be thankful.

Take a look at Arduino OPC Server connect with KEPServer - YouTube

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