A low volume  has been inundated with bot registrations before we noticed.  I have been able to delete all the bad users, all the bad folders, run the recursive file doo-dad, but I have NOT been able to get to site settings to turn off registration (which we don't really need)

I'm pretty desperate - can someone help me figure out how to fix "site settings " (error below) or how to get to the registration disabling settings if not that?  

THANKS IN ADVANCE FOR WHATEVER HELP YOU HAVE TO OFFER!

Site settings throws a generic object reference not set....error.  Below are the specifics:

AssemblyVersion: 7.0.5

PortalID: 1

PortalName: eCHAM

UserID: 1

UserName: host

ActiveTabID: 102

ActiveTabName: Site Settings

RawURL: /Admin/SiteSettings.aspx

AbsoluteURL: /Default.aspx

AbsoluteURLReferrer: http://www.echam.org/Admin.aspx

UserAgent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.125 Safari/537.36

DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke

ExceptionGUID: 027ed426-7a71-4748-ad3a-39e08a806ba3

InnerException: Object reference not set to an instance of an object.

FileName:

FileLineNumber: 0

FileColumnNumber: 0

Method: DotNetNuke.Web.UI.WebControls.DnnFilePickerUploader.LoadFiles

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.Web.UI.WebControls.DnnFilePickerUploader.LoadFiles() at DotNetNuke.Web.UI.WebControls.DnnFilePickerUploader.LoadFolders() at DotNetNuke.Web.UI.WebControls.DnnFilePickerUploader.Page_Load(Object sender, EventArgs e) at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) at System.Web.UI.Control.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:

Edoardo,

I was able to disable the registration by going into the database in some settings table and setting the registration for the portal to 0 or 1.  Since I had another portal with disabled registration I was able to copy the setting confidently.  If you need more info let me know, I will log into database and check for you.  I did have to get my host to give me DB access to solve this issue - I was unable to use the dnn user management to delete or disable users.