I implemented Dynamic registration on our site a few weeks ago, and everything appeared to be working fine. However, I just noticed that when I try to look at the users who belong to a particular user role now by going to: Admin -> Security Roles and then clicking on the 'Manage Users' icon beside a group, I get the following error message:

Error: User Roles is currently unavailable.

And in the event viewer I see the following:

ModuleId

: -1
ModuleDefId: -1
FriendlyName: User Roles
ModuleControlSource: Admin/Security/SecurityRoles.ascx
AssemblyVersion: 04.07.00
PortalID: 0
PortalName: Online@DaLearning
UserID: 3385
UserName: Steve Malkin
ActiveTabID: 41
ActiveTabName: Security Roles
RawURL: /Admin/SecurityRoles/tabid/41/ctl/User Roles/RoleId/6/Default.aspx
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer: https://dacp.dpmt.carlton.local/Admin/SecurityRoles/tabid/41/ctl/User%20Roles/RoleId/6/Default.aspx
UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 19342a54-0fab-4a9b-bd3a-f7f94f8ad9a3
InnerException: Object reference not set to an instance of an object.
FileName: C:\Sites\dacp.dalearning-online.org.uk\website\Admin\Security\SecurityRoles.ascx.vb
FileLineNumber: 636
FileColumnNumber: 21
Method: DotNetNuke.Modules.Admin.Security.SecurityRoles.grdUserRoles_ItemDataBound
StackTrace:
Message: DotNetNuke.Services.Exceptions.ModuleLoadException: 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.Admin.Security.SecurityRoles.grdUserRoles_ItemDataBound(Object sender, DataGridItemEventArgs e) in C:\Sites\dacp.dalearning-online.org.uk\website\Admin\Security\SecurityRoles.ascx.vb:line 636 at System.Web.UI.WebControls.DataGrid.OnItemDataBound(DataGridItemEventArgs e) at System.Web.UI.WebControls.DataGrid.CreateItem(Int32 itemIndex, Int32 dataSourceIndex, ListItemType itemType, Boolean dataBind, Object dataItem, DataGridColumn[] columns, TableRowCollection rows, PagedDataSource pagedDataSource) at System.Web.UI.WebControls.DataGrid.CreateControlHierarchy(Boolean useDataSource) at System.Web.UI.WebControls.BaseDataList.OnDataBinding(EventArgs e) at System.Web.UI.WebControls.BaseDataList.DataBind() at DotNetNuke.Modules.Admin.Security.SecurityRoles.BindGrid() in C:\Sites\dacp.dalearning-online.org.uk\website\Admin\Security\SecurityRoles.ascx.vb:line 226 at DotNetNuke.Modules.Admin.Security.SecurityRoles.DataBind() in C:\Sites\dacp.dalearning-online.org.uk\website\Admin\Security\SecurityRoles.ascx.vb:line 322 at DotNetNuke.Modules.Admin.Security.SecurityRoles.Page_Load(Object sender, EventArgs e) in C:\Sites\dacp.dalearning-online.org.uk\website\Admin\Security\SecurityRoles.ascx.vb:line 420 --- End of inner exception stack trace ---
Source:
Server Name: DPMT

I strongly suspect this is related to the Dynamic registration module, but before I remove DR to prove that is this a problem that anyone else has come across, and if so, is there a fix?

Thanks
Steve

Hi. This is an error that came about because of your specific DNN version (4.7) and also a combination of Dynamic Registration.

There is a thread on here referring to this, but you can also review this thread on DotNetNuke. If you upgrade DNN this should fix the issue but basically it related to default language properties not being setup for users initially. You probably were not (many times you wouldnt want to) ask the user their default language, and if their is no default language for the site its throwing this error.  I think it was for default language and ofr default time zone.

-Chad

Hi Chad,

Thanks for the pointers, implementing the suggestions in the Dotnetnuke forums post has got everything working for me again.

Cheers
Steve