Error after upgrading from Editor 1.9.2 to 1.9.6

Link to test case:
Debugger code (debug.datatables.net):
Error messages shown:
Description of problem: I get the following error, please advise

System.MissingMethodException
HResult=0x80131513
Message=Method not found: 'DataTables.Editor DataTables.Editor.Process(System.Web.HttpRequest)'.
Source=TBDotNet.Model

Bit of code is this:

[System.Web.Http.Route("ABC/CRUDServABC")]
[System.Web.Http.HttpGet]
[System.Web.Http.HttpPost]
public ActionResult CRUDServABC(int intContTpe, long lngContIdx, int intItemTpe, long lngItemIdx, string strItemNme, int intRemoveABC)
{
    ABCUISettings lblo = new ABCUISettings();
    return Json(ABCModel.CRUDServABC(intContTpe, lngContIdx, intItemTpe, lngItemIdx, strItemNme, intRemoveABC, lblo), JsonRequestBehavior.AllowGet);
}

Thanks.