Hey,

I have a vanilla U10 site.

Ive added en-GB & de-DE.

Ive removed en-US and set en-GB as the default language

Ive created 1 node at the root of the tree with 2 child nodes, all in en-GB and published.

I then use the code below to get the root (called from a UmbracoPageController):

using (var umbracoContextReference = _umbracoContextFactory.EnsureUmbracoContext())
{
    var root = umbracoContextReference.UmbracoContext.Content.GetByRoute("/", false, "en-GB");
}

That works, and returns the root IPublishedContent.

But this is where things get strange.

root.Children has no results

root.ChildrenForAllCultures has the two en-GB children

Then.... If the doc type for the root node is "Site" which has a content picker property called "Error404Page" (VaryByCulture enabled), if i do :

var siteRoot = new Site(root, _publishedValueFallback)

This works to map to the concreate class, but accessing siteRoot.Error404Page throws an exception in Umbraco "Value cannot be null. (Parameter 'key1')"

I can also confirm i get the same issue if i remove all the languages except the default en-GB, only now, siteRoot.Error404Page is null and not throwing an exception.

I can also confirm that if i turn off "VaryByCulture" on the Error404Page property, it works fine.

Im stumped. Is this a bug in U10 or am i doing something stupid ?