So I was able to fix the issue of the master not being able to see more than one computer. I deleted all the veyon files and reinstalled on all three PCs (master and two clients) and created a new key pair for the master and changed the access group to Users from the default Administrator then I exported that public key to the two clients after adding the clients to the master's Locations @ Computers list.

The weird thing is when I click the test button on the client PCs it still says Authentication keys not setup but the services work so that's all that matters.