What could be causing an unexpected error when trying to edit a root folder name? [closed]

Question

I am using sharepoint 2010 publishing site. When I go to the gui part of sharepoint 2010(allitem.aspx) and go to one of my libraries, check a folder, go to the ribbon and hit edit properties and try to change the folders name I get this error

System.ArgumentNullException: Value cannot be null.  Parameter name: s   
 at System.IO.StringReader..ctor(String s)    
 at System.Xml.XmlDocument.LoadXml(String xml)    
 at Microsoft.SharePoint.Publishing.Internal.WorkflowUtilities.FlattenXmlToHashtable(String strXml)    
 at Microsoft.SharePoint.Publishing.Internal.WorkflowUtilities.DoesWorkflowCancelWhenItemEdited(String associationXml)    
 at Microsoft.SharePoint.Publishing.WebControls.ConsoleDataSource.EnsurePageNotInLockingWorkflowIfInEditMode()    
 at Microsoft.SharePoint.Publishing.WebControls.ConsoleDataSource.LoadDataSource()    
 at Microsoft.SharePoint.Publishing.WebControls.ConsoleDataSource.OnLoad(EventArgs e)    
 at Microsoft.SharePoint.Publishing.WebControls.XmlConsoleDataSource.OnLoad(EventArgs e)    
 at Microsoft.SharePoint.Publishing.WebControls.PublishingSiteActionsMenuCustomizer.OnLoad(EventArgs e)    
 at System.Web.UI.Control.LoadRecursive()    
 at System.Web.UI.Control.LoadRecursive()    
 at System.Web.UI.Control.LoadRecursive()    
 at System.Web.UI.Control.LoadRecursive()    
 at System.Web.UI.Control.LoadRecursive()    
 at System.Web.UI.Control.LoadRecursive()    
 at System.Web.UI.Control.LoadRecursive()    
 at System.Web.UI.Control.LoadRecursive()    
 at System.Web.UI.Control.LoadRecursive()    
 at System.Web.UI.Control.LoadRecursive()    
 at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

I tried the solution from this post but I still have the problem.