CIP Security session error: 0x090C Unknown CA
Possible cause and solution:
- Communication was not established because the certificate presented includes a certificate authority that is either not verifiable or is not trusted so it cannot be used for CIP Security authentication purposes.Verify that the correct device is addressed and that the project configuration includes devices supported by the CIP Security Policy. Please review logs, network setup, and communications data for unusual activity. If this error persists, contact the security administrator or technical support.
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