源码安装DotNetNuke的时候出现上述错误。
具体错误信息为：
Server Error in '/DotNetNuke' Application.
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Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.
Parser Error Message: Could not load file or assembly 'Telerik.Web.UI' or one of its dependencies. The system cannot find the file specified. (.../Website/web.config line 119)
Source Error:
Line 117: <add name="Analytics" type="DotNetNuke.HttpModules.Analytics.AnalyticsModule, DotNetNuke.HttpModules"/>
Line 118: <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
Line 119: <add name="RadUploadModule" type="Telerik.Web.UI.RadUploadHttpModule, Telerik.Web.UI" />
Line 120: </httpModules>
Line 121: <httpHandlers>
/DNN522/Website/web.config Line: 119
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Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053
原因：
没有找到Telerik的程序集，需要加载
解决方案：
将/webroot/dnn5.4.2_S/Library/Components/Telerik/bin下的Telerik.Web.UI.dll手动拷贝到/webroot/dnn5.4.2_S/Website/bin下即可解决问题。