I've recently come across a problem with Courier 2 which i've tried debugging therefore in courier.config i set the debug value set to be "true".

I've been getting this null reference exception when loading the XmlNode object I've determined that this reads in the details for a given repository in the courier.config file. However the name and alias attributes have all been entered accurately and it is not clear exactly why I am receiving this error.

Running Umbraco Umbraco v6.2.4 and Courier Courier_2.7.8.43.v6.

Below is a sample of the log_Debug.txt file.

09/10/2015 16:39:06; addding filter: d8e6ad85-e73a-11df-9492-0800200c9a66
09/10/2015 16:39:06; addding filter: 2ab40e30-e292-11df-85ca-0800200c9a66
09/10/2015 16:43:45; addding filter: d8e6ad80-e73a-11df-9492-0800200c9a66
09/10/2015 16:43:45; addding filter: d8e6ad81-e73a-11df-9492-0800200c9a66
09/10/2015 16:43:45; addding filter: d8e6ad85-e73a-11df-9492-0800200c9a66
09/10/2015 16:43:45; addding filter: 2ab40e30-e292-11df-85ca-0800200c9a66
09/10/2015 16:43:45; Opening session: 3015f475-f0e0-450c-a856-e7ce86753236
09/10/2015 16:43:45; Closing session: 3015f475-f0e0-450c-a856-e7ce86753236
09/10/2015 16:43:46; addding filter: d8e6ad80-e73a-11df-9492-0800200c9a66
09/10/2015 16:43:46; addding filter: d8e6ad81-e73a-11df-9492-0800200c9a66
09/10/2015 16:43:46; addding filter: d8e6ad85-e73a-11df-9492-0800200c9a66
09/10/2015 16:43:46; addding filter: 2ab40e30-e292-11df-85ca-0800200c9a66
09/10/2015 16:43:53; addding filter: d8e6ad80-e73a-11df-9492-0800200c9a66
09/10/2015 16:43:53; addding filter: d8e6ad81-e73a-11df-9492-0800200c9a66
09/10/2015 16:43:53; addding filter: d8e6ad85-e73a-11df-9492-0800200c9a66
09/10/2015 16:43:53; addding filter: 2ab40e30-e292-11df-85ca-0800200c9a66
09/10/2015 16:43:53; Opening session: 95e60296-ddc8-4868-84e9-76111753c9db
09/10/2015 16:43:53; Closing session: 95e60296-ddc8-4868-84e9-76111753c9db
09/10/2015 16:43:54; addding filter: d8e6ad80-e73a-11df-9492-0800200c9a66
09/10/2015 16:43:54; addding filter: d8e6ad81-e73a-11df-9492-0800200c9a66
09/10/2015 16:43:54; addding filter: d8e6ad85-e73a-11df-9492-0800200c9a66
09/10/2015 16:43:54; addding filter: 2ab40e30-e292-11df-85ca-0800200c9a66
09/10/2015 16:43:54; addding filter: d8e6ad80-e73a-11df-9492-0800200c9a66
09/10/2015 16:43:54; addding filter: d8e6ad81-e73a-11df-9492-0800200c9a66
09/10/2015 16:43:54; addding filter: d8e6ad85-e73a-11df-9492-0800200c9a66
09/10/2015 16:43:54; addding filter: 2ab40e30-e292-11df-85ca-0800200c9a66
09/10/2015 16:46:36; addding filter: d8e6ad80-e73a-11df-9492-0800200c9a66
09/10/2015 16:46:36; addding filter: d8e6ad81-e73a-11df-9492-0800200c9a66
09/10/2015 16:46:36; addding filter: d8e6ad85-e73a-11df-9492-0800200c9a66
09/10/2015 16:46:36; addding filter: 2ab40e30-e292-11df-85ca-0800200c9a66
12/10/2015 12:00:39; System.NullReferenceException: Object reference not set to an instance of an object.
   at Umbraco.Courier.Core.Repository.loadSettings(XmlNode settingsXml)
   at Umbraco.Courier.Core.Storage.RepositoryStorage.GetByAlias(String alias)
   at Umbraco.Courier.UI.Trees.LoadRepositories.Render(XmlTree& tree)
12/10/2015 12:19:25; System.NullReferenceException: Object reference not set to an instance of an object.
   at Umbraco.Courier.Core.Repository.loadSettings(XmlNode settingsXml)
   at Umbraco.Courier.Core.Storage.RepositoryStorage.GetByAlias(String alias)
   at Umbraco.Courier.UI.Trees.LoadRepositories.Render(XmlTree& tree)
12/10/2015 13:59:01; System.NullReferenceException: Object reference not set to an instance of an object.
   at Umbraco.Courier.Core.Repository.loadSettings(XmlNode settingsXml)
   at Umbraco.Courier.Core.Storage.RepositoryStorage.GetByAlias(String alias)
   at Umbraco.Courier.UI.Trees.LoadRepositories.Render(XmlTree& tree)