运行 jekyll serve 时出现如下错误，求解。

D:\GitHub\kanlei.github.com>jekyll serve
Configuration file: D:/GitHub/kanlei.github.com/_config.yml
Source: D:/GitHub/kanlei.github.com
Destination: D:/GitHub/kanlei.github.com/_site
Generating...
Error reading file D:/GitHub/kanlei.github.com/_layouts/default.html: No such fi
le or directory @ rb_sysopen - D:/GitHub/kanlei.github.com/GitHub/kanlei.github.
com/_layouts/default.html
Error reading file D:/GitHub/kanlei.github.com/_layouts/page.html: No such file
or directory @ rb_sysopen - D:/GitHub/kanlei.github.com/GitHub/ka...
/_layouts/page.html
Error reading file D:/GitHub/kanlei.github.com/_layouts/post.html: No such file
or directory @ rb_sysopen - D:/GitHub/kanlei.github.com/GitHub/ka...
/_layouts/post.html
Error reading file D:/GitHub/kanlei.github.com/_posts/core-samples/2011-12-29-je
kyll-introduction.md: No such file or directory @ rb_sysopen - D:/GitHub/kanlei.
github.com/GitHub/kanlei.github.com/_posts/core-samples/2011-12-29-jekyll-introd
uction.md

操作系统：windows 8.1
Jekyll version: jekyll 2.5.0
gem -v: 2.2.2