>Maybe I'm barking up the wrong tree but isn't that your own code (in 'SysManager.Web.Areas.AccountingAudit.Controllers.PaymentTypesController)

That controller is the first one in the areas (e.g. areas start with AccountingAudit area and this is the first controller there).

The error happens before the Index method of that controller is hit (as I have a breakpoint here).

Also, does it matter that we're running in Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.34237 ?