Hi!

We upgraded Commerce to 11.4 and implemented EPiServer.Cms.UI.AspNetIdentity on the login page.

That gave us this exception:

[ArgumentNullException: Värde får inte vara null.
Parameternamn: virtualPath]
   EPiServer.Shell.ShellInitialization.WaitForInitializeModules() +153
   EPiServer.Shell.<>c__DisplayClass11_0.b__1(Object sender, EventArgs args) +17

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) +0
   System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) +128
   System.Delegate.DynamicInvokeImpl(Object[] args) +153
   EPiServer.Framework.Initialization.InitializationEngine.OnInitComplete() +241
   EPiServer.Framework.Initialization.InitializationEngine.ExecuteTransition(Boolean continueTransitions) +214
   EPiServer.Framework.Initialization.InitializationModule.EngineExecute(HostType hostType, Action`1 engineAction) +402
   EPiServer.Framework.Initialization.InitializationModule.FrameworkInitialization(HostType hostType) +227
   EPiServer.Global..ctor() +103
   ASP.global_asax..ctor() in c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\8e4eadf3\4a4b2790\App_global.asax.9erted9t.0.cs:0

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0
   System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) +197
   System.Activator.CreateInstance(Type type, Boolean nonPublic) +105
   System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark) +1484
   System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) +289
   System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture) +27
   System.Web.HttpRuntime.CreateNonPublicInstance(Type type, Object[] args) +79
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +294
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +333

[HttpException (0x80004005): Exception has been thrown by the target of an invocation.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +525
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +124
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +700

I then fond this article:

https://episerver.zendesk.com/hc/en-us/articles/115004119606-Shell-Initialization-Errors-in-Commerce-Manager-When-Updated-to-v10

Telling me to remove EPiServer.Cms.UI.AspNetIdentity.dll. If I remove it, my project wont compile. If I remove these:
EPiServer.Cms.Shell.UI.dll
EPiServer.UI.dll
EPiServer.Shell.UI.dll
EPiServer.Shell.dll

It fails because EPiServer.Cms.UI.AspNetIdentity.dll requires them.

Maybe you cant use EPiServer.Cms.UI.AspNetIdentity.dll in the Commerce Manager?

The Login.aspx.cs looks like this:

using Designonline.Shared.Identity;
using EPiServer.Cms.UI.AspNetIdentity;
using Microsoft.AspNet.Identity.Owin;
using System;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace Designonline.Manager
{
    /// 

    /// This is a custom code behind for the login page for CommerceManager
    /// to get OWIN authentication.
    /// 
    /// 
    /// We replace the original one as a build step when building this project. 
    /// See the AfterBuild msbuild target in this files project file for details 
    /// on how that is done.
    /// 
    public partial class Login : Page
    {
        private const string UserLoginFailureMessage = "Login failed. Please try again.";

        private ApplicationSignInManager _signInManager;

        protected void Page_Load(object sender, EventArgs e)
        {
            Page.Header.DataBind();

            _signInManager = Request.GetOwinContext().Get>();
            LoginCtrl.Authenticate += LoginCtrl_Authenticate;

            if (IsPostBack)
            {
                return;
            }
            LoginCtrl.FindControl("ApplicationRow").Visible = Mediachase.Commerce.Core.AppContext.Current.GetApplicationDto().Application.Count != 1;
            LoginCtrl.Focus();
        }

        protected void LoginCtrl_Authenticate(object sender, AuthenticateEventArgs e)
        {
            var userName = ((TextBox)LoginCtrl.FindControl("UserName")).Text;
            var password = ((TextBox)LoginCtrl.FindControl("Password")).Text;
            var remember = ((CheckBox)LoginCtrl.FindControl("RememberMe")).Checked;

            var validated = _signInManager.PasswordSignInAsync(userName, password, remember, false).Result == SignInStatus.Success;
            if (validated)
            {
                HandleLoginSuccess(userName, remember);
            }
            else
            {
                HandleLoginFailure(UserLoginFailureMessage);
            }
        }

        private void HandleLoginSuccess(string userName, bool remember)
        {
            string url = FormsAuthentication.GetRedirectUrl(userName, remember);
            if (url.Equals(FormsAuthentication.DefaultUrl, StringComparison.OrdinalIgnoreCase) ||
                url.Contains(".axd") ||
                url.Contains("/Apps/Core/Controls/Uploader/"))
            {
                url = "~/Apps/Shell/Pages/default.aspx";
            }

            Response.Redirect(url);
        }

        private void HandleLoginFailure(string pageMessage)
        {
            LoginCtrl.FailureText = pageMessage;
        }
    }
}

Thanks!

/Kristoffer