SharePoint site collection access 404 page not found error

If you encounter some of the errors below and especially when trying to access a page or the front page of a site collection or site then the problem might be related to missing page layout or master page references.

This may be due to the fact that you have migrated content from an older SharePoint version and the content database is referencing an older hive version.

So check that you solution packages are installed using compatibility mode:

install-spsolution -identity solution.wsp -webapplication “site url” -gacdeployment -CompatibilityLevel All

Relying on fallback logic in VghostPageManager::getGhostDocument() for document: ‘C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\Template\SiteTemplates\somesite\default.aspx’

This collection already contains an address with scheme http. There can be at most one address per scheme in this collection.


How to set O365 PageLayout Associated Content Type field

Here is a code snippet to set your page layouts associated content type. This one was a bit weird when I first tried to set it.

 private static void SetPageLayoutMetadata(Web web, File uploadFile, string title, string publishingAssociatedContentType)
// Speficy that the page layout is a page layout and not a master page
var parentContentTypeId = ""0x01010007FF3E057FA8AB4AA42FCB67B453FFC100E214EEE741181F4E9F7ACC43278EE811""; //Page Layout
var gallery = web.GetCatalog(116);
web.Context.Load(gallery, g => g.ContentTypes);

var contentTypeId = gallery.ContentTypes.FirstOrDefault(ct => ct.StringId.StartsWith(parentContentTypeId)).StringId;
var item = uploadFile.ListItemAllFields;

item["ContentTypeId"] = contentTypeId;
item["Title"] = title;
item["PublishingAssociatedContentType"] = publishingAssociatedContentType;


Two important things:

  • parentContentTypeId: This is the ID that tells O365 that this page layout is actually page layout, this is a static id which is defined in the code
  • publishingAssociatedContentType: This is your actual content type to which you want to associate your page layout to: Example of the format:;#my content type name;#0x010100C568DB52D9D0A14D9B2FDCC96666E9F2007948130EC3DB064584E219954237AF3900242457EFB8B24247815D688C526CD44D00A3428808D7DE6A4RABF83921AFB25424;#
    • So the format should be in the following way:

public static String BuildPublishingAssociativeContentTypeId(ContentType contentType)
String contentTypeAssociativeID = null;
if(contentType != null)
contentTypeAssociativeID = String.Format(";#{0};#{1};#", contentType.Name, contentType.StringId);

return contentTypeAssociativeID;