Setup could not connect to the web site. Tried both {0} and {1}. This could be due to the site or its application pool not ...

Setup could not connect to the web site.  Tried both {0} and {1}.  
This could be due to the site or its application pool not running.  It might also be due to an incomplete or failed previous deployment of EP to this site. The message from IIS was:
{2}