Confirmed, it does not work with Prologue.
It is as if they put the plugin in Cubase, added the ability to use it in a couple instruments, and then abandoned it.
It is not useful at all in this state, except in very specific circumstances. (you have to want to use where it works.)
This is the bad side of the programs development, where things are unfinished, loose ends untied, inexplicable omissions persist literally for years without being removed, explained or put right.
EDIT: Though in fairness I should mention it does work in Halion Sonic SE, which came after the plugin.
EDIT 2: It does work with Prologue, see below.
EDIT 3: No it doesn’t.