In order to bootstrap chef on a Windows server via WinRM, you'll need to install the knife-windows plugin on your CloudBolt instance so that knife will be able to connect to a remote Windows server via the WinRM transport. More info about this plugin is available at: https://github.com/chef/knife-windows.
You can install the plugin by using the the chefdk gem command:
$ /opt/chefdk/embedded/bin/gem install knife-windows
You can verify it is installed by running:
$ knife winrm --help