Manifest Login

I went to log into Manifest and it gave me an error for every log in of Epicor Manifest has an improper Server URL. I tried the link in a web browser and it did not work. Ideas where to find the correct URL?

Note: When you try the website from the server, it works. When you try it from a local computer, it does not work. Firewall is off.

This is from the Manifest Help file:
To identify the URL information:

Access your IIS (Internet Information Services Manager). Expand the menu tree to list the Sites. Select the Site you are using. Select content View from the bottom of the screen.
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Right click on the Global.aspx file. A window will open.
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Select Browse. The URL that display’s is the URL to access the Epicor Manifest application.
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Yeah and its the same address but still getting the error.