نمایش ارور 404 - File or directory not found

[HttpPost]
        public ActionResult SubmitProductCatTizer(MZPDB.ProductCatTizer model, long proCatId, HttpPostedFileBase file)
        {

            if (ModelState.IsValid)
            {
                if (file == null)
                    return RedirectToAction("AddProductCatTizer");

                var guid = Guid.NewGuid().ToString("N");
                var fullPath = Server.MapPath("~/Uploaded/" + guid + ".mp4");
                file.SaveAs(fullPath);
                Dbcontex.ProductCatTizers.Add(new MZPDB.ProductCatTizer()
                {
                    Title = model.Title,
                    Description = model.Description,
                    ProductCatId = proCatId,
                    VideoFile = guid,
                    Status = true

                });
                Dbcontex.SaveChanges();
                return RedirectToAction("ListProductCatTizer", "ListAdmin", new { area = "AdminPanel" });
            }
            return View("AddProductCatTizer");
        }