This is my first try at timelapse I downloaded the the NEF raw files on card into Bridge as DNG files where I get preview images then opened the file in Timelapse and clicked initialize metadata and at the top it said initalizing metadata but no indicator bar slider appeared and the preview box said no preview found, solution please try to embed one with lightroom>metadata>udate DNG preview and metadata.

I closed Timelapse and opened Lightroom selected file- all and udated all images then when I reopen in Timelapse I still have no previews and the same message.
Thanks for any help.

I solved this bye deleting the previous exiftool download then downloaded an updated version installed in LRTimelapse and this time the previews are coming up :-)