Poser can be a bit iffy using morph data from external runtimes. I would recommend that you run the installer and point it to both P7 and P8 base directory. You can still load the figure and apply the morphs from your chosen external runtime, but adding the deltas to your base install seems to work more reliably.

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"you are terrifying
and strange and beautiful
something not everyone knows how to love." - Warsan Shire