I just installed fresh instances of DNN 7.03.01 (20) on 2 sites. I've tried using default DNN Skins & Containters to, but not luck. 

All is fine, except when I go to "Admin-Site Settings" I see this error

"A critical error has occurred. Selection out of range Parameter name: value."

So when I check my event viewer I see the below error. I've also checked to ensure that the "Portals" module is installed in the host-extensions. Here's the event viewer log...

AssemblyVersion:7.3.1

PortalID:0

PortalName:My Website

UserID:1

UserName:host

ActiveTabID:62

ActiveTabName:Site Settings

RawURL:/Admin/Site-Settings

A critical error has occurred.

AssemblyVersion:7.3.1

PortalID:0

PortalName:My Website

UserID:1

UserName:host

ActiveTabID:62

ActiveTabName:Site Settings

RawURL:/Admin/Site-Settings

AbsoluteURL:/Default.aspx

AbsoluteURLReferrer:http://diamondshi.onewaveclient.com/Admin/Log-Viewer

UserAgent:Mozilla/5.0 (Windows NT 6.3; WOW64; rv:30.0) Gecko/20100101 Firefox/30.0

DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke

ExceptionGUID:2918a2c7-ea2d-4838-9c9a-cd5beb845ab1

InnerException:Selection out of range Parameter name: value

FileName:

FileLineNumber:0

FileColumnNumber:0

Method:Telerik.Web.UI.RadComboBox.PerformDataBinding

StackTrace:

Message:

DotNetNuke.Services.Exceptions.PageLoadException: Selection out of range Parameter name: value ---> System.ArgumentOutOfRangeException: Selection out of range Parameter name: value    at Telerik.Web.UI.RadComboBox.PerformDataBinding(IEnumerable dataSource)    at Telerik.Web.UI.RadComboBox.PerformSelect()    at DotNetNuke.Web.UI.WebControls.DnnSkinComboBox.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.Control.LoadRecursive()    at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)    --- End of inner exception stack trace ---

Source:

Server Name: onewave

Parameter name: value ---> System.ArgumentOutOfRangeException: Selection out of range Parameter name: value at Telerik.Web.UI.RadComboBox.PerformDataBinding(IEnumerable dataSource) at Telerik.Web.UI.RadComboBox.PerformSelect() at DotNetNuke.Web.UI.WebControls.DnnSkinComboBox.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.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace ---