Describe the bug

Seeing this exception after downloading file from repository in the logs:

2018-11-12 09:45:14,514 [RD00155D56612F][Thread:40][FATAL] DotNetNuke.Framework.PageBase - An error has occurred while loading page.
System.Web.HttpException (0x80004005): Server cannot append header after HTTP headers have been sent.
at System.Web.HttpResponse.AppendHeader(String name, String value)
at System.Web.HttpResponseWrapper.AddHeader(String name, String value)
at System.Web.Helpers.AntiXsrf.AntiForgeryWorker.GetFormInputElement(HttpContextBase httpContext)
at System.Web.Helpers.AntiForgery.GetHtml()
at DotNetNuke.Framework.ServicesFrameworkImpl.RegisterAjaxAntiForgery(Page page)
at DotNetNuke.Framework.PageBase.OnPreRender(EventArgs e)
at DotNetNuke.Framework.DefaultPage.OnPreRender(EventArgs evt)
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
2018-11-12 09:45:14,526 [RD00155D56612F][Thread:40][FATAL] DotNetNuke.Web.Common.Internal.DotNetNukeHttpApplication - System.Web.HttpException (0x80004005): Error executing child request for /site/ErrorPage.aspx. ---> System.Web.HttpException (0x80004005): Server cannot set content type after HTTP headers have been sent.
at System.Web.HttpResponse.set_ContentType(String value)
at System.Web.UI.Page.SetIntrinsics(HttpContext context, Boolean allowAsync)
at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)
at System.Web.UI.Page.ProcessRequest(HttpContext context)
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.ExecuteInternal(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage, VirtualPath path, VirtualPath filePath, String physPath, Exception error, String queryStringOverride)
at System.Web.HttpServerUtility.Execute(String path, TextWriter writer, Boolean preserveForm)
at System.Web.HttpServerUtility.Transfer(String path, Boolean preserveForm)
at System.Web.HttpServerUtility.Transfer(String path)
at DotNetNuke.Framework.PageBase.OnError(EventArgs e)
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.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)

On DNN8 file still gets downloaded, but on DNN9.2.2 this download gets stuck and never finishes

Software Versions

• DNN: 8 & 9.2.2
• Module: 04.00.00

To Reproduce

Steps to reproduce the behavior:

1. Downlaod any file from repository