I think you're running into this issue: OPC UA connection "unable to find valid certification path to requested target" - #9 by Kevin.Herron
For now, you'll have to just leave the certificate validation disabled.
I think you're running into this issue: OPC UA connection "unable to find valid certification path to requested target" - #9 by Kevin.Herron
For now, you'll have to just leave the certificate validation disabled.