Error connecting UPC UA with node

If the computer with wifi works, try using wifi on the other one. It maybe a network issue. If you know a network person, ask them for some help.

I did I disabled the Ethernet and I connect it with another IP address but the same problem
I think the issue in the firewall or certificate issue mister @zenofmud u r amazing person and very kind

Try checking the firewall config. If it's the same, It's probably a certificate issue. Delete all certificates and reattempt the connection, see if it creates a new one.

I delete it from firewel of windows or
Certificate from the softwares ?!