Hi,
we are permanently getting the following error when a user tries to add a new topic:

[InvalidOperationException: Sequence contains no elements]
System.Linq.Enumerable.First(IEnumerable`1 source) +446
YAF.Pages.posts.BindData() +1778
YAF.Pages.posts.Page_Load(Object sender, EventArgs e) +4145
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +25
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +42
System.EventHandler.Invoke(Object sender, EventArgs e) +0
System.Web.UI.Control.OnLoad(EventArgs e) +132
System.Web.UI.Control.LoadRecursive() +66
System.Web.UI.Control.LoadRecursive() +191
System.Web.UI.Control.LoadRecursive() +191
System.Web.UI.Control.LoadRecursive() +191
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2428

OS: Windows Server 2003 R2 x64 SP2 (IIS 6.0)
Framework 3.5

In fact the new topic is saved, go to the forum overview the topic is there. I can open it and post an answer (without error). Is this a known issue?

Thx for help.

I can open it and post an answer (without error). Is this a known issue?
.

I can't reproduce it. Maybe an integration issue.

Maybe an integration issue.

Bingo! You are right; We use Deutsch(Deutschland) setting. I switched to English(United States), and guess what? It worked.

BUT, to make it more complex for you. :twisted:

When I switched back to Deutsch(Deutschland), the error did not reappear. So maybe this is an installation issue.

By the way, there is another language issue. When you are not loged in, there is the following text on top of the page:

Welcome Guest! To enable all features please Anmelden or Registrieren.

You see..... Is there a quick way to solve this problem?

You see..... Is there a quick way to solve this problem?

Use my updated German language File

And my special thanks to tha_watcha! You made my day,.... (wie der anglophile zu sagen pflegt). 👍