Odd, I've set up 4 servers, and never had an issue like this... well, when in doubt with this kind of issue, I do one of three things...
1 and 2. I retry, often times by making a folder path that has no spaces in it.
3. I spam all of the possible missing items into every folder, AFTER making sure there is nothing missing, or nothing damaged/mislabled.
I highly doubt that'll help, but -shrugs- worse comes to worse, 1 and 2 is probably the best bet... OS's are picky about the dumbest stuff...