After an upgrade to the latest DNN that went catastrophically wrong Friday, we had no choice but to restore our site to a version from a few weeks ago. (Something went wrong with the backups that were made just before the upgrade.)

The site appears to be working normally, except for some reason it can't find any of the DDR menus I have in the skin.
This is one of the errors:
An error has occurred. DotNetNuke.Services.Exceptions.ModuleLoadException: Couldn't load menu style 'StandardMegaRCUtop': System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Web.DDRMenu.DNNCommon.DNNContext.get_ModuleFolder() at DotNetNuke.Web.DDRMenu.DNNCommon.PathResolver.Resolve(String path, RelativeTo[] roots) at DotNetNuke.Web.DDRMenu.MenuBase.Instantiate(String menuStyle) ---> System.ApplicationException: Couldn't load menu style 'StandardMegaRCUtop': System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Web.DDRMenu.DNNCommon.DNNContext.get_ModuleFolder() at DotNetNuke.Web.DDRMenu.DNNCommon.PathResolver.Resolve(String path, RelativeTo[] roots) at DotNetNuke.Web.DDRMenu.MenuBase.Instantiate(String menuStyle) at DotNetNuke.Web.DDRMenu.MenuBase.Instantiate(String menuStyle) at DotNetNuke.Web.DDRMenu.SkinObject.OnPreRender(EventArgs e) --- End of inner exception stack trace ---

All of my DDR menu templates are still there. I have checked and rechecked the links to the templates. I cannot figure out why we are getting these errors.

DNN Support suggested we need to upgrade our version of the DDR Menu module, but that did not work. They don't know what else to tell us.

This is our site: http://www.rcu.msstate.edu/

I'd need to see the line in your skin file that specifies the menu template and it's location.

I solved the issue by moving my DDR menu template folders from DesktopModules/DDRmenu to my skin's folder.
I don't understand why this was necessary since the menus had been working with the templates in DesktopModules/DDRmenu for almost a year now. :/
DNN!