The Affiliate Edit page has an error with its validation system. If the user leaves one of the input fields empty, it will throw an error. We worked on this, and here is the solution we found - I suggest this fix is added to 3.8:
In AffiliateController, there are two actions, both named AffiliatedOrderList. We changed 'AffiliatedOrderList(DataSourceRequest command, AffiliatedOrderListModel model)' name to 'AffiliatedOrderGridList' and the error was solved. It must be noted that the same actions are used in AffiliatedOrderList.cshmtl by the kendoGrid too, and this fix applies there as well.
I am pasting the source updated codes below:
AffiliateController.cs:
line 320: [HttpPost] public ActionResult AffiliatedOrderGridList(DataSourceRequest command, AffiliatedOrderListModel model)