U4-3401 - Unable to go to umbraco back office

Created by Jonathan Guy 05 Nov 2013, 20:44:50 Updated by Jonathan Guy 14 Nov 2013, 19:02:21

I just downloaded the Umbraco 7RC and tried to give it a go. After completing the install wizard, and clicking the "Set up your new website" button, I am taken to a completely empty page. I noticed the following javascript error:

Failed to load resource: the server responded with a status of 500 (Internal Server Error) http://localhost:50000/umbraco/Application

I tried in firefox, chrome, and IE10 and got the same error in each. I am able to browse the front end of the site OK.


Michael Law 05 Nov 2013, 22:54:57

Error message is:

Method not found: 'System.Collections.Generic.IEnumerator`1<Newtonsoft.Json.Linq.JToken> Newtonsoft.Json.Linq.JArray.GetEnumerator()

Down to incorrect version of Json.Net. If you use the version in file -> new project in 2012 it gives this error. Seems like if you use the version in the RC its fine.

Shannon Deminick 12 Nov 2013, 09:39:59

Think we're going to ship with json.net 4.5 instead of 5 as this will cause less headaches - the new webapi2 also still doesn't ship with 5 so should be ok.

Shannon Deminick 13 Nov 2013, 00:35:59

I've reverted the v7 to use Newtonsoft.Json 4.5.11 including our nuget package dependency. Should resolve this issue.

Jonathan Guy 14 Nov 2013, 19:02:21

Just wanted to confirm that this did fix my issue. I am running nightly build 158 at the moment with no major issues.

Priority: Normal

Type: Exception

State: Fixed

Assignee: Shannon Deminick

Difficulty: Normal


Backwards Compatible: True

Fix Submitted:

Affected versions: 7.0.0

Due in version: 7.0.0


Story Points: