Null reference error

[Sebbe]

Hi, I just installed the content manager version 0.5.3 (didn't have any versions prior) I have not added anything in code, just installed the packages -> build -> visit website

When I go to the content manager, I get YSOD with a null reference error. The stacktrace:

[NullReferenceException: Objektreferanse er ikke satt til en objektforekomst.] EPiServer.Labs.ContentManager.AvailableLanguagesResolver.Format(LanguageBranch x, LanguageBranch defaultLanguageBranch) +192 System.Linq.WhereSelectListIterator2.MoveNext() +116 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList(JsonWriter writer, IEnumerable values, JsonArrayContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty) +276 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty) +1194 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList(JsonWriter writer, IEnumerable values, JsonArrayContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty) +823 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty) +1194 Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType) +402 Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value, Type objectType) +1129 EPiServer.Framework.Serialization.Json.Internal.JsonObjectSerializer.Serialize(TextWriter textWriter, Object value) +74 EPiServer.Labs.ContentManager.BootstrapViewModelExtensions.Serialize(Object val) +188 EPiServer.Labs.ContentManager.BootstrapViewModelExtensions.GetSerializedContentManagerSettings(BootstrapperViewModel viewModel) +873 ASP.cms_episerver_labs_content_manager_views_gridview_index_aspx.Rendercontrol4(HtmlTextWriter __w, Control parameterContainer) in \cms\episerver-labs-content-manager\Views\GridView\Index.aspx:102 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +117 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +132 ASP.cms_shell_views_shared_sleek_master.Rendercontrol1(HtmlTextWriter __w, Control parameterContainer) in \cms\Shell\Views\Shared\Sleek.Master:26 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +117 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +132 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +271 System.Web.Mvc.ViewPage.Render(HtmlTextWriter writer) +75 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +132 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +9490`

[barteksekula]

We are not able to reproduce in any of our test sites. Please send me the screenshot of enabled languages from your admin mode.

[Sebbe]

Hi, here is the languages we have enabled. This is also a multisite, not sure if that have anything to do though

[barteksekula]

@Sebbe would it be possible for you to run this code in any page controller?

var languageBranchRepository = ServiceLocator.Current.GetInstance<LanguageBranchRepository>();
var requestContext = ServiceLocator.Current.GetInstance<RequestContext>();
var languageSettingsHandler = ServiceLocator.Current.GetInstance<IContentLanguageSettingsHandler>();
IList<LanguageBranch> GetCurrentUserLanguages(ContentReference contentLink)
{
    var localLanguageBranches = languageBranchRepository.ListEnabled();
    return localLanguageBranches.Where(b =>
        b.QueryEditAccessRights(requestContext.HttpContext.User) &&
        languageSettingsHandler.IsLanguageAllowed(contentLink, b.LanguageID)).ToList();
}

object Format(LanguageBranch langBranch, LanguageBranch paramDefaultLanguageBranch)
{
    var regionName = langBranch.Culture.IsNeutralCulture
        ? langBranch.Culture.Name
        : new RegionInfo(langBranch.Culture.LCID).TwoLetterISORegionName;

    return new
    {
        IsDefault = langBranch.LanguageID == paramDefaultLanguageBranch.LanguageID,
        Country = regionName.ToUpper(),
        Name = langBranch.LanguageID,
        DisplayName = langBranch.Name
    };
}

var languageBranches = GetCurrentUserLanguages(currentPage.ContentLink);

var branch = languageBranchRepository.Load(CultureInfo.CurrentUICulture);
var defaultLanguageBranch = branch ?? languageBranches.FirstOrDefault();

if (!languageBranches.Any())
{
    var rootLanguages = GetCurrentUserLanguages(ContentReference.RootPage);
    if (rootLanguages.Any())
    {
        languageBranches = rootLanguages;
    }
    else
    {
        // If languages are not set up for root we should fallback to all enabled ones
        languageBranches = languageBranchRepository.ListEnabled();
    }
}

foreach (var languageBranch in languageBranches)
{
    var formatted = Format(languageBranch, defaultLanguageBranch);
}

For some reason, for one of your languages

var formatted = Format(languageBranch, defaultLanguageBranch);

will fail.

I tried to reproduce on our test sites but wasn't able to so I'd appreciate your help to identify the problematic language.

[Sebbe]

I wish I could say YES! it failed, but no. It works perfectly

I have used Jetbrainds dotpeak to make a symbol for the dll and gone through. It goes through twice (the format code) but it never fails there. it fails further down.

I wonder if it is something in our solution that we may have overwritten and that does so it fails? No idea what that can be though

[barteksekula]

Were you able to catch that exception? I mean with the generated pdbs, so we can be sure which exact line with what arguments fails?

[utopkar]

@barteksekula I am facing a similar issue after installing Gridview 0.5.3. This is what I see:

[NullReferenceException: Object reference not set to an instance of an object.] EPiServer.Labs.GridView.DojoPathInitialization.ConfigureDojoPath(Object sender, EventArgs e) +82

[barteksekula]

@utopkar any stacktrace?