Netconf connectors unreadable due to "data model content does not exist"

Observed on: Boron, "only", with suite "netconfready.robot"

If content of any Netconf connectors (or the list of Netconf connectors) is requersted (URIs under "restconf/config/network-topology:network-topology/topology/topology-netconf"), the received response is always the following error: "Request could not be completed because the relevant data model content does not exist". What is strange is that creating or deleting Netconf connectors appears to work (received response code is of the 2xx variety).