The page was not displayed because the request entity is too large.

Solution

• Modify applicationHost.config (located at %WINDIR%\system32\inetsrv\config) by changing from the OutSystems installation checklist recommended values to larger value<requestLimits maxAllowedContentLength=”134217728″ /> to larger size 
  <requestLimits maxAllowedContentLength=”250000000″ />  – i.e. greater than OSP file size.
• Modify machine.config (located at %WINDIR%\Microsoft.NET\Framework64\v4.0.30319\CONFIG\machine.config) timeout from default 110 secs to 2000 secs (about 33minutes)  and maxRequestLength from 131072 to a larger value, we set it to 131072000