Cause :  Website is either stopped in IIS  or it is not created on IIS or hostname is incorrect in website binding.

Resolution :

• Log into your server via remote desktop.
• Click on Start – Run – Type  inetmgr – Press enter key.
• Expand IIS – Click on sites – Check your website’s status.
• If it shows stopped, then click on the start button.  If it is already started, then right click on the website.
• Click on edit binding – verify your website’s hostname in website binding settings.