reveal slide doesn't work in Mac if you included "space " in your slide folder name

Now for our company internal sharing, I use Asciidocfx to prepare a sharing material slide.   I found everything works find in Asciidocfx preview console.

But it will fail if I browser it on browser.   After use firebug to debug the error message, I found the issue was caused by “failed to load reveal css”.

Therefore I back to check the folder structure, I found there is a space in folder name.  After remove it.  Wow,  everything  works fine.