I have a trial version of Nagios XI installed. I previously had Nagios Core with PNP4Nagios installed and was able to get an icon on a host or service screen that when hovered over would produce a graph like this

In my quest to enable this functionality, I read that recent versions of Nagios XI no longer use PNP4Nagios but instead employ custom written code for graphing. I have read every forum on the interwebz and am still at a loss. Am I missng something simple?
I have read the Nagios XI FAQ, searched this forum and the paid support forum exhaustively and spent a good bit of time trying to follow the directions on the PNP4Nagios javascript popup instructions and all to no avail.
Could someone be so kind as to point my thick head in the right direction?
TIA