Hi, I think I have a solutiono for you.

First you should have the en-US or what ever language you have (the 4 letter language/languages) as your CMS site master language in the config file for the site, you shouldn't use the 'en' as master language.

Secondly you need to fix an issue that has already been solved by some nice person but I can't find the thread currently.

Below is the code we have used to get around the issue. You need an initialization module and a fixed CatalogEntryPageRoute. I suggest you have this in a separate project so you can easily remove the assembly from the bin when an official fix is release.

Initialization module:

using EPiServer.Business.Commerce;
using EPiServer.Business.Commerce.HttpModules;
using EPiServer.Business.Commerce.Providers;
using EPiServer.Framework;
using EPiServer.Web.Routing;
using log4net;
using Mediachase.Commerce.Engine.Navigation;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Creuna.Commerce.EntryPageFix
{
	[ModuleDependency(typeof(InitializeCommerceManagerModule))]
	public class CommerceEntryPageFixInitialization : IInitializableModule
	{
		private static readonly ILog Logger = LogManager.GetLogger(typeof(CommerceEntryPageFixInitialization));

		private bool _isInitialized;

		public void Initialize(EPiServer.Framework.Initialization.InitializationEngine context)
		{
			if (!this._isInitialized)
			{
				var entryViewUrl = UrlService.GetUrl(Constants.EntryViewCommandName);

				if (!string.IsNullOrEmpty(entryViewUrl) && !entryViewUrl.StartsWith("~"))
				{
					entryViewUrl = "~" + entryViewUrl;
				}

				var defaultRoute = new FixedCatalogEntryPageRoute("{seourl}.aspx", entryViewUrl);

				Type typeToRemove = typeof(CatalogEntryPageRoute);

				foreach (Delegate d in ContentRoute.CreatedVirtualPath.GetInvocationList())
				{
					// remove only the delegates that are a match to the faulting original implementation of CatalogEntryPageRoute.OnVirtualPathCreated
					if (typeToRemove.Equals(d.Target.GetType()) && string.Compare("OnVirtualPathCreated", d.Method.Name, StringComparison.OrdinalIgnoreCase) == 0)
					{
						ContentRoute.CreatedVirtualPath -= (EventHandler<UrlBuilderEventArgs>)d;

						CommerceEntryPageFixInitialization.Logger.Info(string.Format("Removing delegate, class '{0}' and method '{1}'.", d.Target.ToString(), d.Method.Name));
					}
				}

				ContentRoute.CreatedVirtualPath = (EventHandler<UrlBuilderEventArgs>)Delegate.Combine(ContentRoute.CreatedVirtualPath, new EventHandler<UrlBuilderEventArgs>(defaultRoute.OnVirtualPathCreated));

				this._isInitialized = true;
			}
		}

		public void Preload(string[] parameters)
		{
		}

		public void Uninitialize(EPiServer.Framework.Initialization.InitializationEngine context)
		{
		}
	}
}

    And the fixed CatalogEntryPageRoute class

using EPiServer.Business.Commerce.Providers;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web;

namespace Creuna.Commerce.EntryPageFix
{
	/// <summary>
	/// Fixes the base implementation not handling null return value from VirtualPathUtility.RemoveTrailingSlash(e.UrlBuilder.Path) in the OnVirtualPathCreated method.
	///  If the result from the method is null nothing is done otherwise the base implementation is called.
	/// </summary>
	public class FixedCatalogEntryPageRoute : CatalogEntryPageRoute
    {
		public FixedCatalogEntryPageRoute(string url, string physicalFile) : base(url, physicalFile) { }

		public override void OnVirtualPathCreated(object sender, EPiServer.Web.Routing.UrlBuilderEventArgs e)
		{
			string vp = VirtualPathUtility.RemoveTrailingSlash(e.UrlBuilder.Path);

			if (!string.IsNullOrWhiteSpace(vp))
			{
				base.OnVirtualPathCreated(sender, e);
			}
		}
    }
}

Hi @Antti Alasvuo , Thanks for solution. Sorry for late reply.

• I did some work around for that issue , I enabled "en-AU" language in cms with out disabling "en",
• Then I added "en-AU" in ecommerce manager >Administration>System settings>Dictionaries>Languages ,
• I marked en-AU as "Default" language in ecommerce by setting "Is default" property enabled for en-AU and disabled for "en"
• Then I set en-AU(English (Australia)) as default language in ecommerce manager >Administration>System settings>common settings >default language
• Now I am able to browse site normally and page tree view is working fine in edit mode and link collection property is also working fine.

I will try your solution and let you know the result. once again thanks for sharing detailed code.

Thanks

nani