Do those servers have proper access to the admin4.nsf on the Domino Server you are trying to pull the system databases from (admin4.nsf, names.nsf)? You can try just making an OS Level copy from another Domino server of admin4.nsf and rerun the setup to see if it gets past this point…
My guess would be ACL issue or maybe network connectivity between the servers…
…I copied the admin4.nsf from another server and then re-ran the set up successfully. Not sure why that is, not ideal, but it’s worked and my 3 servers are up and running.