The SEYUAUTH loadlib must be added to the agent's STEPLIB if CICSPLEX is in use. This will allow the finding of the EYUINIT module and other REXX functions. If you are not using CICSPLEX, then the value of the Active field for the 'ET Get CICS Plex', and 'ET Get CICS Plex Info' probes in the 'Mainframe Probes' table in the ServiceNow app should be set to "false".