A config like
<api port="2000">
<balancer>
<cluster>
<node host="localhost" port="2001" />
</cluster>
</balancer>
<target host="dummy" port="443">
<ssl/>
</target>
</api>
(nothing listening on 2001)
and curl localhost:2000 causes a message like "Target http://localhost:2001/path is not reachable" to be displayed.
It should be https instead of http, as https is actually used.