Hello,
We have a solution using a master site with 14 different language layers.
We're running into an issue where the language management tool throws this error:
2025-07-15 14:07:41.343: Exception of type 'System.Web.HttpUnhandledException' was thrown.
System.Web.HttpUnhandledException (0x80004005): Exception of type 'System.Web.HttpUnhandledException' was thrown.
System.NullReferenceException: Object reference not set to an instance of an object.
at Dynamicweb.Admin.Languages.Page_Load(Object sender, EventArgs e)
at System.Web.UI.Control.OnLoad(EventArgs e)
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.HandleError(Exception e)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest()
at System.Web.UI.Page.ProcessRequest(HttpContext context)
at ASP.admin_content_paragraph_languages_aspx.ProcessRequest(HttpContext context)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step)
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
2025-07-15 14:07:41.343: Request headers: [ "Connection", "Accept", "Accept-Encoding", "Accept-Language", "Cookie", "Host", "Referer", "User-Agent", "sec-ch-ua", "sec-ch-ua-mobile", "sec-ch-ua-platform", "upgrade-insecure-requests", "sec-fetch-site", "sec-fetch-mode", "sec-fetch-user", "sec-fetch-dest", "priority" ]
2025-07-15 14:07:41.343: Request item keys: [ "AspSessionIDManagerInitializeRequestCalled", "Dynamicweb.Controls.Resources.Current", "AspSession", "Dynamicweb.Environment.Web", "ExecutionTableMapper", "alternateUrlKey", "Dynamicweb.RewriteUrl", "owin.Environment" ]
2025-07-15 14:07:41.343: Request form: []
I can see the paragraph is registered on the other language layers:
And if I go through each of them individually, it seems to be synced and working fine.
But if i go to "Advanced" > "Language management" on the master site on this specific item, it throws this exception:
It seems to be happening on a lot of items, although when creating a new item on the master site, the language management tool works.
It's happening at this URL: /Admin/Content/Paragraph/Languages.aspx?ParagraphID=49787 (and same goes for many other paragraphs)
And a health check on content data has 0 errors:
Running DW v9.19.1