Please post the full error message. The interpretation of the numbers depends on the kind of error we are dealing with.

Assuming for the rest of this answer that, from the error message, the number 0x80131500 represents an OPC UA StatusCode, then it stands for BadSecurityChecksFailed (CodeBits = 0x8013; with additional FlagBits = 0x1500).

This is most likely generated on the server side - it looks like that the server isn't happy with the way the client connects to it, security-wise. Try to investigate on the server, what precisely it is complaining about.

Best regards