I’ve already looked at this thread to generate thumbnails and made sure my options are up to par:
For some reason, odt and ods file thumbnails work, but doc, docx, xls and xlsx thumbnails don’t. I tried re-saving the files (I figured maybe LibreOffice needed to generate a thumbnail for a specific file if there was none). I’m not sure if it might be a setting within Word and Excel that inhibits these thumbnails.
Does anyone have any experience with this?