Agent services are down.
Release : 4.3
Component : Process Automation
On one of the orchestrator nodes, in the in PAM\server\c2o\.c2orepository\.c2oagentresources\lib\c2o\jars folder, the cwotransport-snapshot.jar was missing. When agent machine rebooted, it tried to collect this file again from the Orchestrator and did not find it.
The other orchestrator node had this file so we copied it over to the machine where it was missing, restarted the Orchestrator, then restarted the agent service on the agent machine. Now it can start correctly.