In 6.8 Setup, it's not posible to retrieve the web site

Behavior:
The cause of this behavior is there’s an ftp binding defined on the IIS and the DocuWare SetupUI 
cannot retrieve the web sites.

Solution:
In order to continue the setup,you should add a http binding on the ftp web site. 

Not requeired step:
Re-run set up again after adding the binding, then when setup is complete remove the binding.