Since upgrading from DNN 5.6.2 to DNN 6.2.1 I am unable to create a new child portal using any of the built-in templates.  From what I recall, earlier versions of DNN didn't require you to specify a template when creating a portal, but now I am forced to select one.  Whether I choose Blank or Default, I get the below error.  I have not modified the templates in any way.  I haven't been able to determine what SQL procedure is causing the error or why an invalid length parameter is being passed, and I don't see any similar errors in the forums.  Is anyone familiar with this?

Error parsing Website TemplateInvalid length parameter passed to the LEFT or SUBSTRING function. The statement has been terminated. at System.Data.SqlClient.SqlConnection. (SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlDataReader.ConsumeMetaData() at System.Data.SqlClient.SqlDataReader.get_MetaData() at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) at System.Data.SqlClient.SqlCommand.ExecuteScalar() at Microsoft.ApplicationBlocks.Data.SqlHelper.ExecuteScalar(SqlConnection connection, CommandType commandType, String commandText, SqlParameter[] commandParameters) at Microsoft.ApplicationBlocks.Data.SqlHelper.ExecuteScalar(String connectionString, CommandType commandType, String commandText, SqlParameter[] commandParameters) at Microsoft.ApplicationBlocks.Data.SqlHelper.ExecuteScalar(String connectionString, String spName, Object[] parameterValues) at DotNetNuke.Data.SqlDataProvider.ExecuteScalar(String ProcedureName, Object[] commandParameters) at DotNetNuke.Data.SqlDataProvider.ExecuteScalar[T](String ProcedureName, Object[] commandParameters) at DotNetNuke.Data.SqlDataProvider.AddTabToEnd(TabInfo tab, Int32 createdByUserID) at DotNetNuke.Entities.Tabs.TabController.AddTabInternal(TabInfo tab, Int32 afterTabId, Int32 beforeTabId, Boolean includeAllTabsModules) at DotNetNuke.Entities.Tabs.TabController.AddTab(TabInfo objTab) at DotNetNuke.Entities.Tabs.TabController.DeserializeTab(XmlNode tabNode, TabInfo tab, Hashtable tabs, Int32 portalId, Boolean isAdminTemplate, PortalTemplateModuleAction mergeTabs, Hashtable modules) at DotNetNuke.Entities.Portals.PortalController.ParseTab(XmlNode nodeTab, Int32 PortalId, Boolean IsAdminTemplate, PortalTemplateModuleAction mergeTabs, Hashtable& hModules, Hashtable& hTabs, Boolean IsNewPortal) at DotNetNuke.Entities.Portals.PortalController.ParseTabs(XmlNode nodeTabs, Int32 PortalId, Boolean IsAdminTemplate, PortalTemplateModuleAction mergeTabs, Boolean IsNewPortal) at DotNetNuke.Entities.Portals.PortalController.ParseTemplate(Int32 PortalId, String TemplatePath, String TemplateFile, Int32 AdministratorId, PortalTemplateModuleAction mergeTabs, Boolean IsNewPortal) at DotNetNuke.Entities.Portals.PortalController.CreatePortal(String portalName, UserInfo adminUser, String description, String keyWords, PortalTemplateInfo template, String homeDirectory, String portalAlias, String serverPath, String childPath, Boolean isChildPortal)