I'm trying to have my DotNetNuke(7) website redirect to a subdomain when the visitor is on mobile. When I go to the admin section, select Site Redirection Management, and select Mobile Redirect, the popup opens and immediately closes and then I receive this error:

A critical error has occurred.
Object reference not set to an instance of an object.

Google searches tend to turn up people talking about issues with their modules and such. How would I go about fixing this?

EDIT:

I've found this error log in the event viewer:

ExceptionGUID: 67032a58-f850-4620-b564-118e5750bb20
InnerException: Object reference not set to an instance of an object.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: DotNetNuke.Modules.MobileManagement.SimpleSettingsView.OnLoad
StackTrace:
Message: DotNetNuke.Services.Exceptions.PageLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Modules.MobileManagement.SimpleSettingsView.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace ---
Source:

Thank you for your time.