Rundeck error from OSFamily set to winnt

[dmitarb]

I am getting the following error on Rundeck 2.6.6 (Windows 2012R2 server) when using the URL resource:

Execute failed: java.io.IOException: Cannot run program "\bin\sh": CreateProcess error=2, The system cannot find the file specified
11:26:02 Failed: NonZeroResultCode: Result code was -1
11:26:02 Execution failed: 5290: [Workflow result: , step failures: {2=Dispatch failed on 1 nodes: [server.domain.com: NonZeroResultCode: Result code was -1]}, Node failures: {server.domain.com=[NonZeroResultCode: Result code was -1]}, status: failed]

When I change the lib/chef-rundeck.rb line 174 from:

os_family = node['kernel_os'] =~ /winnt|windows/i ? 'winnt' : 'unix'

to:
os_family = node['kernel_os'] =~ /winnt|windows/i ? 'windows' : 'unix'

my job executes successfully.

Is there a know issue for this?