01.[NullReferenceException: Object reference not set to an instance of an object.]
02. DotNetNuke.UI.UserControls.TextEditor.Page_Load(Object sender, EventArgs e) +314
03.
04.[ModuleLoadException: An error has occurred.]
05. DotNetNuke.Services.Exceptions.Exceptions.ProcessModuleLoadException(String FriendlyMessage, Control UserCtrl, Exception exc) +291
06. DotNetNuke.Services.Exceptions.Exceptions.ProcessModuleLoadException(Control UserCtrl, Exception exc) +42
07. DotNetNuke.UI.UserControls.TextEditor.Page_Load(Object sender, EventArgs e) +504
08. System.Web.UI.Control.OnLoad(EventArgs e) +99
09. System.Web.UI.Control.LoadRecursive() +47
10. System.Web.UI.Control.LoadRecursive() +131
11. System.Web.UI.Control.LoadRecursive() +131
12. System.Web.UI.Control.LoadRecursive() +131
13. System.Web.UI.Control.LoadRecursive() +131
14. System.Web.UI.Control.LoadRecursive() +131
15. System.Web.UI.Control.LoadRecursive() +131
16. System.Web.UI.Control.LoadRecursive() +131
17. System.Web.UI.Control.LoadRecursive() +131
18. System.Web.UI.Control.LoadRecursive() +131
19. System.Web.UI.Control.LoadRecursive() +131
20. System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1061
21.
22.[PageLoadException: An error has occurred.]
23. DotNetNuke.Services.Exceptions.Exceptions.ProcessPageLoadException(Exception exc, String URL) +351
24. DotNetNuke.Framework.PageBase.Page_Error(Object Source, EventArgs e) +377
25. System.Web.UI.TemplateControl.OnError(EventArgs e) +105
26. System.Web.UI.Page.HandleError(Exception e) +73
27. System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +6944
28. System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +154
29. System.Web.UI.Page.ProcessRequest() +86
30. System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +18
31. System.Web.UI.Page.ProcessRequest(HttpContext context) +49
32. ASP.default_aspx.ProcessRequest(HttpContext context) +4
33. System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +154
34. System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64
. In my scenario, i was unable to get it working even after application pool recycle, manual restart of web server or anything similar. However, overwriting files inside upgrade package was the solution for me.