Mysteriously, the following error started appearing in our logs for the checkout page. We haven't made any changes to the site is a month or more, and we are running DNN v9.8.0 and HC v3.5.0:

[quote]Message:Error executing child request for handler 'System.Web.Mvc.HttpHandlerUtil+ServerExecuteHttpHandlerAsyncWrapper'.

StackTrace:

InnerMessage:Error executing child request for handler 'System.Web.Mvc.HttpHandlerUtil+ServerExecuteHttpHandlerAsyncWrapper'.

InnerStackTrace:

at System.Web.HttpServerUtility.ExecuteInternal(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage, VirtualPath path, VirtualPath filePath, String physPath, Exception error, String queryStringOverride)
at System.Web.HttpServerUtility.Execute(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage)
at System.Web.HttpServerUtility.Execute(IHttpHandler handler, TextWriter writer, Boolean preserveForm)
at System.Web.Mvc.Html.ChildActionExtensions.ActionHelper(HtmlHelper htmlHelper, String actionName, String controllerName, RouteValueDictionary routeValues, TextWriter textWriter)
at System.Web.Mvc.Html.ChildActionExtensions.Action(HtmlHelper htmlHelper, String actionName, String controllerName, RouteValueDictionary routeValues)
at Hotcakes.Commerce.Dnn.Mvc.MvcRenderingEngine.Render(String controllerName, String actionName, String viewName, Object routeValues)
at Hotcakes.Modules.Checkout.CheckoutView.RenderView()
at Hotcakes.Commerce.Dnn.Web.HotcakesModuleBase.OnLoad(EventArgs e)[/quote]

I've tried clearing the cache, restarting the app, resetting file permissions, and even stopping/restarting the app pool.

Thank you for any advice you can provide!