Server Error in '/' Application.

siteName is null or empty.
Parameter name: siteName

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: siteName is null or empty.
Parameter name: siteName

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[ArgumentException: siteName is null or empty.
Parameter name: siteName]
   Kentico.Membership.KenticoUserStore`1..ctor(String siteName) +127
   OPA.App_Start.<>c__DisplayClass1_0.<Configuration>b__0() in C:\wwwroot\opa2023\OPA\App_Start\Startup.Auth.cs:35
   Microsoft.AspNet.Identity.Owin.<Invoke>d__5.MoveNext() +125
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +32
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +62
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.<RunApp>d__7.MoveNext() +197
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +32
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +62
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.<DoFinalWork>d__12.MoveNext() +192
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +32
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.StageAsyncResult.End(IAsyncResult ar) +118
   System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +510
   System.Web.<>c__DisplayClass285_0.<ExecuteStepImpl>b__0() +40
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +155
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +134


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4690.0