Denoise and Photo AI will not open Nikon .NEF raw files

Today Topaz denoise and photo AI reports an unknown error whenever I try to open any of my Nikon raw files. This behaviour is seen with the Lightroom add-on directly and also in standalone mode.

Hi @brian.lee8, has Photo AI worked fine with files from your same camera in the past? Is this version 1.2.10 that you’re working with?

Also, please let me know exactly what camera model these files are coming from – thanks!