That means some of your services failed to start. You can see them if you run `systemctl;` without the `status` argument.
They should show something like,
loaded failed failed
Or you can just list the failed services with `systemctl --failed`, in my case it shows
UNIT LOAD ACTIVE SUB DESCRIPTION
postgresql@9.4-main.service loaded failed failed PostgreSQL Cluster 9.4-main
LOAD = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB = The low-level unit activation state, values depend on unit type.
Normally, you'll need to read the journal/log to figure out what to do next about that failing item, by using `journalctl -xe`. If you just want to reset the units so the system "says" `running` with a green dot, you can run:
systemctl reset-failed