Agent installation on virtual servers

I'm trying to complete the managed system set-up (for the first time, so reading a lot and trying to understand some basics).

I've already installed diagnostic agents on one server V-CL04A, but from the number of red traffic lights, I've not finished yet.

Any recommendations as to correct deployment in this particular case? A concrete example like this would help me understand the AgentInstallationStrategy document a bit better. Are there three more agents to be installed?

thanks

Phil