sharepoint _layouts/ManageFeatures runtime error

sharepont publishing feature

portal/_layouts/ManageFeatures.aspx

Runtime Error

Description: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed.

It gives this error massage

 

Solution:

 <asp:panel runat="server" visible="false"> 
    <asp:ContentPlaceHolder id="PlaceHolderSiteName" runat="server"/>
  </asp:panel>

Add the above in your master page.

Also Change the Custom Errors in the layouts web.config to "Off". You will then see errors.

C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\LAYOUTS\web.config