Does VMware vRO plugin for Chef work on vCenter Orchestrator (vSphere 5.5)?

I installed the following plugin in my vCenter Orchestrator v. 5.5.3 (vCenter Server 5.5):

https://solutionexchange.vmware.com/store/products/chef-plugin-for-vrealize-orchestrator

‘Run SSH command’ workflow works but ‘SCP put’ is generating errors (e.g. can’t read local file).

Some Chef workflows like ‘Add New Client’ are giving me authentication error (even though I added Chef server successfully, I use chef server 11 and 12).

Is this plugin supposed to work on vSphere 5.5?

Does this plugin require vSphere 6?