Hi
Have you checked in the GUI? Screenshot actually doesn't help. Can you check the machineagent.log file and see if anything meaningful?
Have you enabled SIM ? https://docs.appdynamics.com/display/PRO42/Enable+Server+Monitoring
Are you on SaaS or OnPrem Controller?
You can also check if your agent reports in the AppDynamics -> Admin page (click on the upper right wheel icon to find this meanu) and go to Machine agent
JB