I tried to install a 1120-S component, and nothing happened.
I then uninstalled Proseries, and tried to reinstall it and I have the same message as you.
This is in addition to the fact that e-filing status was inaccurate (showed as if I had not filed it as opposed to "received by Intuit").
I'm in the same boat. At this point, I think that some Intuit servers are down. I went through all the help articles about the firewall...