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KB10060: Sys.InvalidOperationException popup error is appearing in Management System

Silverlight ribbon is not shown and Sys.InvalidOperationException popup error window is appearing


After the AxCMS is installed you go to Management System and get the error popup window like on screenshot bellow. Also silverlight upper management-ribbon is not available


Silverlight MIME types are missing.

All MIME types needed to support Silverlight are implemented by default in Windows Server 2008 / 7 IIS 7 and Windows Vista SP1 / Windows 7.  Windows Vista RTM customers should add mime types by running "IIS Manager", clicking on "Mime Types", then clicking "add" and adding the following mime types

  • .xaml    application/xaml+xml
  • .xap     application/x-silverlight-app
  • .xbap    application/x-ms-xbap

    IIS 7 users: Getting Started under IIS 7.x

    IIS 6 users: Getting Started under IIS 6.0


    APPLIES TO versions: 9 and newer

    IIS version: 7.x, 6.x