https://www.dotnetzone.gr:443/cs/blogs/birbilis/archive/2012/05/21/troubleshoot-wcf-http-error-404-not-found.aspxCopying from MPPVE (formerly RCE) documentation: …might indicate that WCF is not correctly configured. To resolve the WCF issue The error returned is a “HTTP Error 404 – Not Found”. This might be due to an issue with the WCF scriptmaps registrations.elCommunityServer 2.1 SP3 (Build: 20423.1)