I am running into an error on the Vendors module, not sure if it is the same as yours. Here is the Event Viewer Data.

AbsoluteURL:/Default.aspx
DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke
ExceptionGUID:0cb4d181-13e3-4bb3-b6c0-de478eabe2f7
AssemblyVersion:8.0.4
PortalId:0
UserId:1
TabId:108
RawUrl:/Host/Vendors/portalid/0
Referrer:http://tegsitedev.net/Host/portalid/0
UserAgent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36
ExceptionHash:H4P35abjIqC3CRlJmrkuWQ==
Message:Invalid object name 'Vendors'.
StackTrace:
InnerMessage:Invalid object name 'Vendors'.
InnerStackTrace:
at System.Data.SqlClient.SqlConnection. (SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
at System.Data.SqlClient.SqlInternalConnection. (SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
at System.Data.SqlClient.SqlDataReader.TryConsumeMetaData()
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, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds, Boolean describeParameterEncryptionRequest)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean asyncWrite)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
at System.Data.Common.DbCommand.System.Data.IDbCommand.ExecuteReader(CommandBehavior behavior)
at DotNetNuke.Data.PetaPoco.PetaPocoExt.ExecuteReader(Database database, String sql, Object[] args)
at DotNetNuke.Data.PetaPoco.PetaPocoHelper.ExecuteReader(String connectionString, CommandType type, Int32 timeout, String sql, Object[] args)
at DotNetNuke.Data.SqlDataProvider.ExecuteReader(String procedureName, Object[] commandParameters)
at Dnn.Modules.Vendors.Data.DataService.GetVendors(Int32 PortalId, Boolean UnAuthorized, Int32 PageIndex, Int32 PageSize)
at Dnn.Modules.Vendors.Components.VendorsController.GetVendors(Int32 PortalId, Boolean UnAuthorized, Int32 PageIndex, Int32 PageSize, Int32& TotalRecords)
at Dnn.Modules.Vendors.Vendors.SetDataSource()
at Dnn.Modules.Vendors.Vendors.NeedDataSource(Object sender, GridNeedDataSourceEventArgs e)
at Telerik.Web.UI.RadGrid.OnNeedDataSource(GridNeedDataSourceEventArgs e)
at Telerik.Web.UI.RadGrid.ObtainDataSource(GridRebindReason rebindReason, Boolean IsBoundUsingDataSourceId)
at Telerik.Web.UI.RadGrid.AutoDataBind(GridRebindReason rebindReason)
at Telerik.Web.UI.RadGrid. (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.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
Source:
FileName:
FileLineNumber:0
FileColumnNumber:0
Method:
Server Name: iis2104

My problem was that the BannerClickThrough page just didn't exist at all.  It was a 404 error.  Just copying and pasting the files from the earlier version seems to have done the trick.