Your “unable to render” image shows up fine in PM on my mac. However, your first image “Image 1 1”, indeed shows as unable to render in PM (OS X's Preview shows it just fine though).
I also looked a bit further at the image metadata (with ExifTool's -validate option) and there are a number of warnings. Most you can ignore (they are present in the one that shows OK too). But I think the two that are not also present in the tiff that does show are the reason PM can not render the image:
Warning = Missing required IFD0 tag 0x0111 StripOffsets
Warning = Missing required IFD0 tag 0x0117 StripByteCounts
It looks like (your version of) Color Efex Pro writes files that are not completely valid…
Since they are tifs, simply do as @Soizic suggested: open in PS and resave.
Cheers,
Hayo