A problem occurred on the main polling engine and the server fails. It is noted that statistics for the networking devices polled by a universal device poller (UDP) custom monitor are missing. Which two of the following reasons are possible causes of this event? (Choose two.)
A universal device poller (UDP) is being built for a metric to monitor in a radial gauge of a web console. When a gauge resource in the poller is to be selected, it is found that the resource is grayed out. What could be causing this?