I am not 100% sure what you mean ‘trying on a second RIO’… I think you mean you have two RIOs and you are wanting the exact same flow on both?
You will need to do the same thing on the second RIO as the first. Delete all the groov-io nodes, deploy the flow, delete the unused configurations, then drag a new set of groov-io nodes onto the canvas and reconfigure localhost and the API key.
The reason for this is because Terry configured the certificate in the groov-io node.
I rarely do that as I only use RIO on my local (trusted) network. Terry did the right thing setting up SSL.
The downside is, the certificate in the flow you deploy/copy/move has the SSL settings for RIO #1 which does not match the certificate in RIO #2.
This post here will help.
Bottom line, the IP address or hostname has to match the certificate.
Feel free to ask more questions, or supply some screenshots if I have misunderstood.