I'm on 7.13.4 using fleet server and my agents have disappeared overnight. I've tried restarting the entire cluster (in elastic cloud) and the agents all still show as offline in fleet.
The cluster health is al good too. When I try and enroll a new agent I get :
Error: fail to enroll: fail to execute request to fleet-server: status code: 0, fleet-server returned an error: , messag e: Unknown resource.
Any ideas on how I can get my agents back online please?