Error in OPC.aspx

[ashj]

I came across an error in the error log
An error has occured at https://store.megaplextheatres.com/Checkout/OPC.aspx
Exception: Exception of type 'System.Web.HttpUnhandledException' was thrown. Stack Trace: at System.Web.UI.Page.HandleError(Exception e) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest() at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) at System.Web.UI.Page.ProcessRequest(HttpContext context) at ASP.checkout_opc_aspx.ProcessRequest(HttpContext context) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) Inner Exception: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index Inner Exception Stack Trace: at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource) at System.Collections.Generic.List`1.get_Item(Int32 index) at AbleCommerce.Checkout.OPC.BindShippingMethods(Address address, Boolean recalculateShipRates) at AbleCommerce.Checkout.OPC.Page_Load(Object sender, EventArgs e) at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) at System.EventHandler.Invoke(Object sender, EventArgs e) at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)


The weird thing is, it only occurs for a combination of two products. They're both from different warehouses. Could that cause a problem? Not sure whats going on here. Our OPC page is not customized

[ashj]

found the exact error https://drive.google.com/file/d/1nbOu5i ... sp=sharing