The website cannot display the page

You receive the following error when trying to access the WebMediaPortal logon page:

HTTP 500 Internal Server Error

Make sure your IIS server can host ASP.NET applications. Check that this feature is installed in Control Panel - Programs - Turn Windows features on or off.

Also known as ASP.NET 4.5 in Windows 8.

The website declined to show this webpage

You receive the following error when trying to access the WebMediaPortal logon page:

HTTP 403 Forbidden

•This website requires you to log in.

Make sure that the IIS application is running under the ASP.NET v4.0 or .NET v4.5 Application Pool:

If ASP.NET v4.0 isn't available for selection, make sure that it has been registered to IIS.

Server Error in '/<IIS application name>' Application

Could not load file or assembly 'MPExtended.Libraries.Client' or one of its dependencies. An attempt was made to load a program with an incorrect format.

the IIS Application Pool doesn't accept 32-bit applications. See the IIS Edition page for more information.

Configuration Error

Parser Error Message: Could not load file or assembly 'System.Web.Helpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.

This error will be shown if ASP.NET MVC3 isn't installed. See the IIS Edition page for more information.