The web.config file for this project is missing the required DirectRequestModule.
将应用程序集的模式由集成改为经典即可.
或者如下操作
<system.webServer>
<validation validateIntegratedModeConfiguration="false"/>
<modules>
<remove name="ScriptModule"/>
<add name="DirectRequestModule" type="Ext.Net.DirectRequestModule, Ext.Net" />
</modules>
</system.webServer>