Missing Module paths for sass build RC0

I am creating ionic Project RC0 when i am trying to run ionic serve command. it’s start the server but not showing anything. Anyone having the same issue

Here is the error i am facing. i am using node -v 4.4.7

[12:47:51]  sass started ...                                                                                                 
[12:47:51]  sass failed:  Cannot generate Sass files without first bundling JavaScript files in order to know all used modules. Please build JS files first.                                                                                                                                                                                                                               
[12:47:51]  build dev failed:  Build failed                                                                                                                                                                                                               
[12:47:51]  Missing module paths for sass build

This error say ''first bundling JavaScript files is failed".
You shold fix JacaScript(TypeScript) error.