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HTML Editor Settings issues in 9.9 and 9.8

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John Slater

New Around Here

Posts: 3

New Poster

8/1/2024 9:15 AM

Hi All,

We are having issues getting to the HTML Editor settings in DNN Platform 9.9 and 9.8. Sometimes it works, depending on version, sometimes it doesn't. Note that these sites were upgraded from older versions of DNN. Various methods are described below. Thanks for looking!

Methods to Access HTML Editor Settings

General note: HTML Editor Manager can be very slow to load

Method 1: Site Settings

Note: This method fails on all of our 9.9 and some 9.8 sites.

Select Site Settings from Settings Menu in left menu bar (cog wheel icon)
Select Site Behavior Tab
Select MORE tab
Select Open HTML Editor Manager button
Get 404 error

Method 2: HTML Module Instance

Note: This method fails on some 9.9 sites, Works on 9.8 sites.

Locate an instance of the HTML module. In Edit mode, select Edit Content from the Edit menu (Pencil Icon) of the HTML Module.

Make sure the dropdown menu next to the Version History button is set to Rich Text Editor.
Select Custom Editor Options.

Pop-up window opens with Critical Error
1. https://redacted.com/Defa...one+matching+element

AbsoluteURL:/Default.aspx

DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke

ExceptionGUID:c7a61eaf-c0b2-482a-9472-cadeba9c15cf

AssemblyVersion:9.9.0

PortalId:0

UserId:27274

TabId:36

RawUrl:/Home/tabid/36/ctl/CKEditorOptions/ModuleId/9152/minc/txtContent/PortalID/0/langCode/en-US/popUp/true/Default.aspx

Referrer:https://redacted.com/Home...id/9152/Default.aspx

UserAgent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

ExceptionHash:vhncePbs9ehEi9D27lIp/0FYODQ=

Message:Sequence contains more than one matching element

StackTrace:

InnerMessage:Sequence contains more than one matching element

InnerStackTrace:

at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at DNNConnect.CKEditorProvider.CKEditorOptions.On_gvToolbars_RowDataBound(Object sender, GridViewRowEventArgs e)
   at System.Web.UI.WebControls.GridView.OnRowDataBound(GridViewRowEventArgs e)
   at System.Web.UI.WebControls.GridView.CreateRow(Int32 rowIndex, Int32 dataSourceIndex, DataControlRowType rowType, DataControlRowState rowState, Boolean dataBind, Object dataItem, DataControlField[] fields, TableRowCollection rows, PagedDataSource pagedDataSource)
   at System.Web.UI.WebControls.GridView.CreateChildControls(IEnumerable dataSource, Boolean dataBinding)
   at System.Web.UI.WebControls.CompositeDataBoundControl.PerformDataBinding(IEnumerable data)
   at System.Web.UI.WebControls.GridView.PerformDataBinding(IEnumerable data)
   at System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback(IEnumerable data)
   at DNNConnect.CKEditorProvider.CKEditorOptions.BindUserGroupsGridView()
   at DNNConnect.CKEditorProvider.CKEditorOptions.Page_Load(Object sender, EventArgs e)
   at System.Web.UI.Control.OnLoad(EventArgs e)
   at DotNetNuke.Entities.Modules.PortalModuleBase.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.d__246.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Web.Util.WithinCancellableCallbackTaskAwaitable.WithinCancellableCallbackTaskAwaiter.GetResult()
   at System.Web.UI.Page.d__523.MoveNext()

Source:

FileName:

FileLineNumber:0

FileColumnNumber:0

Method:

Server Name: REDACTED.

Method 3: Find Page in Host Menu that contains the Html Editor Management Module

Note: This method fails on some 9.9 sites, Works on 9.8 sites.

Select Extensions from Settings Menu in left menu bar (cog wheel icon)
Find HTML Editor Management module in extensions list and select the Yes link.
Select Host from the “Showing Pages from Site:” dropdown menu.

Select link to HTML Editor Manager Page

https://redacted.com/Default.aspx?tabid=2316 fails to load – ERR_TOO_MANY_REDIRECTS

Daniel Valadas

Veteran Member

Posts: 349

Helpful Replier

MVP

Engaged Reader

Avid Reader

8/2/2024 3:03 PM

Is the site behind a load balancer, reverse proxy, cloudflare, other waf, etc. Anything that might have ssl termination elsewhere or where the public url would somehow not be the website URL as DNN would know it ?

Will Strohl

Senior Member

Posts: 1607

MVP

New Poster

8/14/2024 7:03 PM

Personally, I have always noticed that this view loads slower than any other in DNN. But, I rarely find myself needing to use it. It's mostly been 'out of sight, out of mind'. 🫣

Will Strohl
Founder & CEO, Upendo Ventures

🛠️ Have a DNN Project? | 🛡️ Need SLA-based DNN Support?

🤔 Was my answer helpful to you? ❤️ Sponsor Us On GitHub

John Slater

New Around Here

Posts: 3

New Poster

1/31/2025 10:29 AM

Posted By Daniel Valadas on 8/2/2024 12:03 PM
Is the site behind a load balancer, reverse proxy, cloudflare, other waf, etc. Anything that might have ssl termination elsewhere or where the public url would somehow not be the website URL as DNN would know it ?

Sorry for the egregiously long delay in response. Yes, it is behind an appliance, and it does... stuff with SSL. The primary alias info for portal 0 is as expected, meaning that the URL the public puts in is what is in the primary alias info. Not sure any of this is helpful.

Michael Hissey

New Around Here

Posts: 2

2/26/2025 5:45 AM

Hi, I am having what looks like the same issue on v9.13.07. Plus if a user is not an administrator (perhaps has edit page permissions) the editor is missing half its buttons at the top and the content does not render correctly. Again it has been upgraded over time since initial installation in 2011. It also sits behind an nginx reverse proxy that handles the SSL, however I get the same symptoms if I access the site locally without SSL on the LAN. Any ideas on where to look?

Timo Breumelhof.

Senior Member

Posts: 1322

Helpful Replier

Lifesaver

New Poster

Engaged Reader

2/26/2025 8:26 AM

I would check the network tab in your browser tools (F12) to see what urls get blocked

Michael Hissey

New Around Here

Posts: 2

2/26/2025 11:03 AM

Good point. To cut a long story short and after consulting a number of other blog posts based on what I then found, I resolved the 404 error on the HTML Editor Manager by changing the "urlFormat" in the web config file from "humanfriendly" to "advanced". This didn't solve the editor not rendering correctly and not showing all the buttons. I resolved this by using the HTML Editor Manager screen to switch on Full Toolbars within the CKEditor Settings. This both showed all the buttons (not surprisingly, I hadn't realised this was a setting!) but also fixed the rendering of the content within the editor window. All fixed, thank you for the pointer!

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