Hi.

After upgrading to episerver 11 we are experiencing that one of our contentProviders are getting an error in the widget.js script. The error is this one:
TypeError: this.noDataMessages is null; can't access its "single" property[Learn More] widgets.js:2:558865

The error occures when i try to click on the root folder for the contentprovider, and no data is returned.
I have debugged through the contentprovider LoadChildrenReferencesAndTypes and LoadContent methods, and both are returning what is expected, but still no data in the cms. the initialization class is as follows:

[InitializableModule]
[ModuleDependency(typeof(InitializationModule))]
public class EmployeeDataProviderInitialize : IInitializableModule
{
public void Initialize(InitializationEngine context)
{
var contentRepository = context.Locate.ContentRepository();
var providerManager = context.Locate.Advanced.GetInstance<IContentProviderManager>();

var entryPoint = contentRepository.GetChildren<EmployeeRootFolder>(ContentReference.RootPage).FirstOrDefault();

if (entryPoint == null)
{
entryPoint = contentRepository.GetDefault<EmployeeRootFolder>(ContentReference.RootPage);
entryPoint.Name = EmployeeDataProviderSettings.ProviderDisplayName;
contentRepository.Save(entryPoint, SaveAction.Publish, AccessLevel.NoAccess);
}

var providerValues = new NameValueCollection
{
{ContentProviderElement.EntryPointString, entryPoint.ContentLink.ID.ToString()},
{ContentProviderElement.CapabilitiesString, ContentProviderElement.FullSupportString}
};

var employeeDataProvider = new EmployeeDataProvider();
employeeDataProvider.Initialize(EmployeeDataProviderSettings.Key, providerValues);
providerManager.ProviderMap.AddProvider(employeeDataProvider);

}

}

Has anyone else experienced this after upgrading? it was running on episerver 10.10.1, and are now running episever 11.10.1

In advance thanks for your help.
Best Regards
Pål