Cant access admin site after moving to server 2012 r2

Oct 20, 2015 at 1:35 PM
Moved Version 2.8 from Server 2008 R2 to server 2012 R2. Front end loads properly (along with widgets) but when logging into admin site I get “ERROR - UNABLE TO LOAD CONTROL : App_Code.Controls.WidgetZone” Here is how it’s being rendered:
<div id="sidebar-right" class="sidebar"> <div class="menu"> ERROR - UNABLE TO LOAD CONTROL : App_Code.Controls.WidgetZone </div> </div> Can't access admin pages because widgets don't display.

Any help would be appreciated.
Nov 18, 2015 at 5:00 AM
I am also getting same issue. It's working in local server which have Windows Server 2008 R2 os and when I am uploading to live server which have Windows Server 2012 os its not working. Getting error when try to access admin panel. As well as I also tried to upload another liver server which have windows 2008 r2 os and its worked there. So please anyone let me know solution ?