I am trying to install Rackspace Private Cloud  using Installation Guide - Using Vagrant And Chef

root@chef:/home/vagrant/chef-cookbooks# git status
# On branch v4.2.3rc

When I start my controller node - I am getting following error. I am not finding any clue to solve this issue. Please help -

--- Console Error log on root@controller:/home/vagrant ---

Recipe: osops-utils::packages
* apt_repository[rpc-extras] action addRecipe: <Dynamically Defined Resource>
* remote_file[/var/chef/cache/Release.key] action create
- create new file /var/chef/cache/Release.key
================================================================================
Error executing action `create` on resource 'remote_file[/var/chef/cache/Release.key]'
================================================================================


Net::HTTPServerException
------------------------
404 "Not Found"


Resource Declaration:
---------------------
# In /var/chef/cache/cookbooks/apt/providers/repository.rb

59: remote_file cached_keyfile do
60: source new_resource.key
61: mode 00644
62: action :create
63: end
64: else

Compiled Resource:
------------------
# Declared in /var/chef/cache/cookbooks/apt/providers/repository.rb:59:in `install_key_from_uri'

remote_file("/var/chef/cache/Release.key") do
provider Chef::Provider::RemoteFile
action [:create]
retries 0
retry_delay 2
path "/var/chef/cache/Release.key"
backup 5
atomic_update true
source ["http://download.opensuse.org/repositories/home:/rpcops:/havana//xUbuntu_12.04/Release.key"]
use_etag true
use_last_modified true
cookbook_name "osops-utils"
mode 420
end


================================================================================
Error executing action `add` on resource 'apt_repository[rpc-extras]'
================================================================================


Net::HTTPServerException
------------------------
remote_file[/var/chef/cache/Release.key] (/var/chef/cache/cookbooks/apt/providers/repository.rb line 59) had an error: Net::HTTPServerException: 404 "Not Found"


Resource Declaration:
---------------------
# In /var/chef/cache/cookbooks/osops-utils/recipes/packages.rb

106: apt_repository name do
107: uri h['uri']
108: distribution h['distribution']
109: components h['components']
110: keyserver h['keyserver']
111: key h['key']
112: notifies :run, "execute[apt-get update]", :immediately
113: end
114: end

Compiled Resource:
------------------
# Declared in /var/chef/cache/cookbooks/osops-utils/recipes/packages.rb:106:in `block in from_file'

apt_repository("rpc-extras") do
action :add
retries 0
retry_delay 2
cookbook_name "osops-utils"
recipe_name "packages"
uri "http://download.opensuse.org/repositories/home:/rpcops:/havana/xUbuntu_12.04/"
distribution "/"
key "http://download.opensuse.org/repositories/home:/rpcops:/havana//xUbuntu_12.04/Release.key"
cache_rebuild true
end

[2017-12-20T09:48:27+00:00] ERROR: Running exception handlers
[2017-12-20T09:48:27+00:00] ERROR: Exception handlers complete
[2017-12-20T09:48:27+00:00] FATAL: Stacktrace dumped to /var/chef/cache/chef-stacktrace.out
Chef Client failed. 19 resources updated
[2017-12-20T09:48:27+00:00] FATAL: Chef::Exceptions::ChildConvergeError: Chef run process exited unsuccessfully (exit code 1)