running "/root/npm/bin/docpad run" failed

[luckypoem]

hi.

root@as3:/dogfeet.docpad# ls
docpad.coffee node_modules package.json plugins README.md resources src
root@as3:/dogfeet.docpad# /root/npm/bin/docpad run
warning: Skipped the unsupported plugin: layout due to version-plugin
warning: Skipped the unsupported plugin: tags due to version-plugin
info: Welcome to DocPad v6.69.0 (local installation: /root/dogfeet.docpad/node_modules/docpad)
notice: If everyone who saw this message donated $1/week, maintaining DocPad would become sustainable: http://docpad.org/donate
info: Contribute: http://docpad.org/docs/contribute
info: Plugins: coffee, robotskirt, uglify
info: Environment: development
info: DocPad listening to http://0.0.0.0:9778/ on directory /root/dogfeet.docpad/out
Performing renderFiles (pass 1) at 4/158 3% -------------------------------------------------terminate called after throwing an instance of 'v8::Persistentv8::Value'
An error occured within the child DocPad instance: exited with a non-zero status code
root@as3:~/dogfeet.docpad#

how to fix it?
tks!