This error message indicates that device is producing TLPs that are not defined in the Emerson ROC configuration.
The driver calls out the specific TLP that is missing for example:
Unable to Resolve?
If the troubleshooting tips did not help you resolve your issues, please open a ticket with Support making sure to include the Emerson ROC configuration and Ignition logs.
From the Ignition Logs view, select the Download icon to download a copy of the system-name.idb file to your local file system. You will need to compress (zip, 7z or rar) this file before sending to Support.