No live logs coming in for Observability Engineers Module Lab 3.3/4.1

Hi, cannot experience the value of Elastic Observability Engineer Training modules 3.3 or 4.1 as when I select "Logs" in the Kibana visualiser I am seeing no live logs appear? Is this a known fault as a colleague has experienced the same issue?
Mark

It's possible that the systems where Filebeat was running got shut down, and Filebeat did not start back up. You should be able to ssh back onto the systems where you set up Filebeat earlier and restart them.