RDWeb exception in Windows Server 2019

[JozefIzsoGoit]

When user access the RDWeb exposed on port 443 directly from the application server with Remote Desktop Service roles and hits these addresses:

https://gw.contoso.com:443/RDWeb/

https://gw.contoso.com:443/RDWeb/Pages/en-US/Default.aspx

The server will log NullReferenceException in Event viewer.

Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 7. 8. 2019 11:40:40
Event time (UTC): 7. 8. 2019 9:40:40
Event ID: 00c125e50abe4c26a3502bc2fc2289bd
Event sequence: 63
Event occurrence: 5
Event detail code: 0

Application information:
Application domain: /LM/W3SVC/1/ROOT/RDWeb/Pages-3-132096433038469260
Trust level: Full
Application Virtual Path: /RDWeb/Pages
Application Path: C:\Windows\Web\RDWeb\Pages\
Machine name: APP1

Process information:
Process ID: 7756
Process name: w3wp.exe
Account name: IIS APPPOOL\RDWebAccess

Exception information:
Exception type: NullReferenceException
Exception message: Object reference not set to an instance of an object.
at Microsoft.TerminalServices.Publishing.Portal.FormAuthentication.TSFormAuthTicketInfo..ctor(HttpContext objHttpContext)
at ASP.en_us_default_aspx.<GetAppsAsync>d__0.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.UI.PageAsyncTaskManager.<ExecuteTasksAsync>d__3.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.UI.Page.<ProcessRequestAsync>d__554.MoveNext()

Request information:
Request URL: https://gw.contoso.com:443/RDWeb/Pages/en-US/Default.aspx
Request path: /RDWeb/Pages/en-US/Default.aspx
User host address: 85.243.21.13
User:
Is authenticated: False
Authentication Type:
Thread account name: IIS APPPOOL\RDWebAccess

Thread information:
Thread ID: 155
Thread account name: IIS APPPOOL\RDWebAccess
Is impersonating: False
Stack trace: at Microsoft.TerminalServices.Publishing.Portal.FormAuthentication.TSFormAuthTicketInfo..ctor(HttpContext objHttpContext)
at ASP.en_us_default_aspx.<GetAppsAsync>d__0.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.UI.PageAsyncTaskManager.<ExecuteTasksAsync>d__3.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.UI.Page.<ProcessRequestAsync>d__554.MoveNext()


Custom event details:

[#2]

@JozefIzsoGoit Did you find any fix for this issue ? 

[#3]

I know this is an old post, but since I killed about three days looking for a resolution I figured I would post what solved the issue for me...

I was having the exact same error and spent several days searching for a solution.  For me what it turned out being was a published app that had been uninstalled from the server.  Once I went in and unpublished the app the website exception fixed itself.  

Hope this helps someone else.

@hansvos 

[#4]

Absolute GOLD RCS 8192, I never expected my errors were from a published app but after removing some, everything worked again, thanks for the post.

[#5]

Spoiler

@Finger1970 I have the same problems I removed in the C:\inetpub\wwwroot dir the web.config and create App_Data folder and all is now OK.

Bye