Sharepoint 2010 Tip: Exception When Editing Pages - MediaWebPart and NullReference

28 February 2012

Had a confusing bug in a stage environment today where you could create pages (such as the inbuilt Article Page), but when you went to edit them it would through an exception: System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.SharePoint.Publishing.WebControls.MediaWebPart.get_WebPartAdderId() at Microsoft.SharePoint.Publishing.WebControls. … more