See below the known issues in the Timestamping Authority solution distributed with PKI Hub 1.4.0.
Large kmdata files not supported (ATEAM-16338)
The evactl import-nshield command does not support kmdata files larger than ~100KB.
tsactl logs not forwarded to Splunk (EDM-13275)
When integrated with a Splunk server, PKI Hub does not forward logs recording tsactl commands. However, these logs can be browsed using the Grafana portal.
See Managing Log Forwarder for integrating a Splunk server or Browsing logs with Grafana for browsing logs in the Grafana portal.