Are there errors in your gateway log? I don't see anything else obvious. (Might be time to have support look over your shoulder.)
No, I don't have any error in my gateway
In your Designer screenshots the OPC server name is "Ignition OPC-UA Server" (with a dash between OPC and UA), but in your Quick Client shot it appears to be defined without that dash.
It's also an entirely different device name... Modbus vs MOXA
Are you showing us screenshots of two different gateways? Perhaps one on Ignition 8.x and one on Ignition 7.x?
Call support
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I finally got it, I don't know if is for the test environment but in production I have the information