I am running DNN 4.6. I am not sure if or what change might have caused this problem, but any user with editting privs gets the following error when entering "Edit Mode" in the top control panel. Everything works fine in "View Mode". Once they enter Edit Mode, I have to reset the setting in the database to get them back to View Mode and functional again. This applies to the site and host admin accounts as well. This leaves me unable to do any edits to the site.

Here is the error:

Server Error in '/site' Application.
The resource cannot be found.
Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly.

Requested URL: /site/Default.aspx


Any guidance on how to resolve this is appreciated. I am at a loss at this point.

Thanks for the quick response.  It is on shared hosting so I am not sure if it is in virtual directory or not.  I do have it in a sub-directory only because the automatic install requires it and as this was my first install of DNN, I didn't want to muck with a manual install and opted for the automated one.

I went back through the logs to when things broke and here are some error messages.  First is the last action taken before things hosed up.  This was deleting a Text module, but I don't even recall what it was doing.  Nothing unusual though.

ModuleId: 467
ModuleTitle: Security
TabModuleID: 307
TabID: 72
PortalID: 0
ModuleDefId: 109
FriendlyName: Text/HTML
IconFile:
Visibility: Maximized
ContainerSrc:
Server Name: WINHOST40

Second is the first error I received:

AssemblyVersion: 04.05.03
PortalID: 0
PortalName:
UserID: 2
UserName:
ActiveTabID: 124
ActiveTabName: User Groups
RawURL: /site/Community/UserGroups/tabid/124/Default.aspx
AbsoluteURL: /site/Default.aspx
AbsoluteURLReferrer: http://www.mysite.com/site/Community/UserGroups/tabid/124/Default.aspx
UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; (R1 1.5); SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.04506; InfoPath.2)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 48e2cf56-ca46-42fc-ba74-99059a8ee28b
InnerException: The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.Web.UI.ControlCollection.AddAt
StackTrace:
Message: DotNetNuke.Services.Exceptions.PageLoadException: The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>). ---> System.Web.HttpException: The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).at System.Web.UI.ControlCollection.AddAt(Int32 index, Control child)at DotNetNuke.UI.Skins.Skin.Page_Init(Object sender, EventArgs e)at System.Web.UI.Control.OnInit(EventArgs e)at System.Web.UI.UserControl.OnInit(EventArgs e)at System.Web.UI.Control.InitRecursive(Control namingContainer)at System.Web.UI.Control.AddedControl(Control control, Int32 index)at System.Web.UI.ControlCollection.Add(Control child)at DotNetNuke.Framework.DefaultPage.Page_Init(Object sender, EventArgs e)at System.Web.UI.Control.OnInit(EventArgs e)at System.Web.UI.Page.OnInit(EventArgs e)at DotNetNuke.Framework.PageBase.OnInit(EventArgs e)at System.Web.UI.Control.InitRecursive(Control namingContainer)at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)--- End of inner exception stack trace ---
Source:
Server Name: WINHOST40

I guess I am due for an upgrade either way.  Are you suggesting that might resolve the issue?  I grabbed Evotiva's backup utility, but haven't used it yet.  Seems like the safer way to go for a DNN novice to ensure everything is backed up appropriately.

When you access the site what URL are you using? When you try to "edit" a module what is the URL that shows up.