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.
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Yesterday I saw a cockroach in the kitchen so I thoroughly cleaned everything. Today I caught my wife putting one in the bathroom!

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