sabnzbd install error

gistfile1.txt

root@grant:~/chef-media-server-master# chef-solo -c solo.rb -j node.json
Starting Chef Client, version 11.6.0
Compiling Cookbooks...

================================================================================
Recipe Compile Error in /root/chef-media-server-master/cookbooks/mediaserver/recipes/default.rb
================================================================================


NoMethodError
-------------
undefined method `[]' for nil:NilClass


Cookbook Trace:
---------------
  /root/chef-media-server-master/cookbooks/sabnzbd/recipes/default.rb:27:in `from_file'
  /root/chef-media-server-master/cookbooks/mediaserver/recipes/default.rb:11:in `from_file'


Relevant File Content:
----------------------
/root/chef-media-server-master/cookbooks/sabnzbd/recipes/default.rb:

 20:  package "par2"
 21:  package "unrar"
 22:  package "python-yenc"
 23:  package "python-openssl"  		# Package contains --
 24:  package "coreutils"				#  nice
 25:  package "util-linux"				#  ionice
 26:
 27>> user node['sabnzbd']['user'] do
 28:    shell '/bin/bash'
 29:    comment 'Web Application - SABnzbd'
 30:    home node['sabnzbd']['install_dir']
 31:    system true
 32:  end
 33:
 34:  app_dirs = [
 35:    "#{node['sabnzbd']['install_dir']}",
 36:    "#{node['sabnzbd']['config_dir']}",



[2013-08-26T11:15:39-07:00] ERROR: Running exception handlers
[2013-08-26T11:15:39-07:00] ERROR: Exception handlers complete
[2013-08-26T11:15:39-07:00] FATAL: Stacktrace dumped to /root/chef-solo/chef-stacktrace.out
Chef Client failed. 0 resources updated
[2013-08-26T11:15:39-07:00] FATAL: Chef::Exceptions::ChildConvergeError: Chef run process exited unsuccessfully (exit code 1)