Archive thumbnails blank

Archive thumbnails have disappeared. Trying to get original archive icons to show, as they were quickly appearing and then being changed to the standard opus archive icon, whilst retaining normal live folder thumbnails, could not do this. reverted to original settings and now there are no archive thumbnails.
Have deleted cache. The original thumbnails will show briefly when i do a folder refresh. Copied an archive to another folder - same issue.

Please show your Thumbnail and Folder Thumbnail settings.


Turn "Display folder frame" back on.

that works, many thanks.