Mike,check what version of Kontakt Player 6 is installed, both in stand alone and the VSTi. That free orchestra calls for version Kontakt Player 6.2.1 or higher. You must have at least that installed.

I ran into the same problem with a paid Kontakt preset program. It played in the stand alone but not in the VSTi. It turned out that the last Kontakt update put the VSTi dll in another folder and not in my VST folder. So the VSTi was an older version that those purchased presets would not play. Once I moved the dll into the right folder all was good.

Whenever I get something stuck in the back of my throat, I dislodge it by drinking a beer.
It's called the Heineken Maneuver.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware