I posted your response to their beta forum (I can't link directly to it since it is beta and they just added DV support). This is the response I got:
The metadata was updated in LAV 0.80 to include DoVi extensions, so they would need to cover that change, if they don't already.
please try the attached file (overwrite in SVP 4\avsf)
does it works better?
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(update SVP in a usual way)