Ah! The files are there, as you can see if you have a look in that folder, but it looks like somehow their filenames got converted to lower-case. That's fine on OSX, Windows and even many linux distros where includes are case-insensitive, but thanks for the heads-up!
I've updated the repo now, so if you pull then it should sort the names out.
The NAS might be running linux that is case sensitive but the file network protocol might not be, CIFS as in normal windows share can be set to case insensitive.