Risk Evaluation requests are unsuccessful for a specific period while the DBTrim utility is running. Once the DBTrim batch operation completes, all Risk Evaluation requests start receiving successful responses.
Symantec Risk Authentication 9.1.5.1
The Symantec Advanced Authentication product team has released the patch Symantec-AdvAuth-9.1.5.1-DE660677-HotFix to add the required index on the ARRFSYSAUDITLOG and ARRFSYSAUDITLOG_3DSECURE tables before the trimming operation, and to remove the index once trimming is complete. The patch can be downloaded from the KB article as well.
Follow these steps to resolve the issue: