Manifest 4.0.4

Hi People,

We recently installed Epicor Manifest version 4.0.4 and trying to test it. In Customer Shipment Entry, once I hit Freight from Actions tab I am getting next error:
Screenshot%20from%202018-08-30%2015-32-46

Any thought why do we get this?

P.S. IP address and URL for a workstation looks correct as gives a response in a web browser.