Hi, 

I just ran into a problem while deploying af site that I have updated from v4.11.10 to 6.1.6. 
I did the update locally and then deployed the database and files. 

However when i deployed the site and logged in to umbraco to see if everything was ok I found out that every published page i tried to view in the backoffice threw a YSOD. 

I can't seem to figure out what's causing this, so any help would be much appreciated. 
Here is the YSOD i get: 

[NullReferenceException: Object reference not set to an instance of an object.]
   Umbraco.Web.PublishedCache.XmlPublishedCache.PublishedContentCache.GetById(UmbracoContext umbracoContext, Boolean preview, Int32 nodeId) +43
   Umbraco.Web.PublishedCache.XmlPublishedCache.PublishedContentCache.DetermineRouteById(UmbracoContext umbracoContext, Boolean preview, Int32 contentId) +35
   Umbraco.Web.PublishedCache.XmlPublishedCache.PublishedContentCache.GetRouteById(UmbracoContext umbracoContext, Boolean preview, Int32 contentId) +87
   Umbraco.Web.Routing.DefaultUrlProvider.GetUrl(UmbracoContext umbracoContext, Int32 id, Uri current, UrlProviderMode mode) +66
   Umbraco.Web.Routing.<>c__DisplayClass3.<GetUrl>b__0(IUrlProvider provider) +28
   System.Linq.WhereSelectArrayIterator`2.MoveNext() +66
   System.Linq.Enumerable.FirstOrDefault(IEnumerable`1 source, Func`2 predicate) +94
   Umbraco.Web.Routing.UrlProvider.GetUrl(Int32 id, Uri current, UrlProviderMode mode) +169
   Umbraco.Web.Routing.UrlProvider.GetUrl(Int32 id) +15
   umbraco.cms.presentation.editContent.UpdateNiceUrls() +168
   umbraco.cms.presentation.editContent.OnPreRender(EventArgs e) +20
   System.Web.UI.Control.PreRenderRecursiveInternal() +83
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +974

The odd thing is that I can access unpublished pages fine, although i can't publish them. When I do i get this YSOD: 

[NullReferenceException: Object reference not set to an instance of an object.]
   umbraco.cms.businesslogic.web.Document.ToXml(XmlDocument xd, Boolean Deep) +176
   umbraco.content.PublishNodeDo(Document d, XmlDocument xmlContentCopy, Boolean updateSitemapProvider) +112
   umbraco.content.UpdateDocumentCache(Document d) +164
   Umbraco.Web.Cache.PageCacheRefresher.Refresh(IContent instance) +79
   Umbraco.Core.Sync.DefaultServerMessenger.InvokeMethodOnRefresherInstance(ICacheRefresher refresher, MessageType dispatchType, Func`2 getId, IEnumerable`1 instances) +388
   Umbraco.Core.Sync.DefaultServerMessenger.MessageSeversForManyObjects(IEnumerable`1 servers, ICacheRefresher refresher, MessageType dispatchType, Func`2 getId, IEnumerable`1 instances) +114
   Umbraco.Core.Sync.DefaultServerMessenger.PerformRefresh(IEnumerable`1 servers, ICacheRefresher refresher, Func`2 getNumericId, T[] instances) +182
   Umbraco.Web.Cache.DistributedCache.Refresh(Guid factoryGuid, Func`2 getNumericId, T[] instances) +192
   Umbraco.Web.Cache.DistributedCacheExtensions.RefreshPageCache(DistributedCache dc, IContent[] content) +202
   Umbraco.Web.Strategies.Publishing.UpdateCacheAfterPublish.UpdateSingleContentCache(IContent content) +52
   Umbraco.Web.Strategies.Publishing.UpdateCacheAfterPublish.PublishingStrategy_Published(IPublishingStrategy sender, PublishEventArgs`1 e) +112
   Umbraco.Core.Events.EventExtensions.RaiseEvent(TypedEventHandler`2 eventHandler, TArgs args, TSender sender) +16
   Umbraco.Core.Publishing.PublishingStrategy.PublishingFinalized(IContent content) +100
   Umbraco.Core.Services.ContentService.SaveAndPublishDo(IContent content, Int32 userId, Boolean raiseEvents) +824
   umbraco.cms.businesslogic.web.Document.SaveAndPublishWithResult(User u) +351
   umbraco.cms.presentation.editContent.Publish(Object sender, EventArgs e) +75
   umbraco.controls.ContentControl.DoSaveAndPublish(Object sender, ImageClickEventArgs e) +75
   System.Web.UI.WebControls.ImageButton.OnClick(ImageClickEventArgs e) +115
   System.Web.UI.WebControls.ImageButton.RaisePostBackEvent(String eventArgument) +124
   System.Web.UI.WebControls.ImageButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +35
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1724

Let me know if additional information is needed. 

/Thor