Recently i have got an error 404 for ISAPI and CGI list settings restrictions list settings on Web Server.
To solve this problem we can set this in IIS.
-> Go to IIS manager click on Server Name.
-> Go in ISAPI and CGI Restrictions.
-> Select ASP.Net 4.0 (your .net version).
-> If it has “Not Allowed” then Right click and select “Allow”.