luistkd's link wasn't precisely my solution, but it got me looking in the right direction. I was getting the same issue as above and I thought it had to do with HTTPS on my MP, but I was able to browse the internet and intranet addresses.
After I had done the initial install, I decided to configure the DP storage space on a different drive from the main install. However, the DP had already created the install package for the client on the original drive.
My solution was to update the DP and the client software was copied to the correct staging drive.
