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Export operations fail in Chrome and Firefox with ERR_CONNECTION_RESET


Product Progress® Telerik® Reporting
Application Type Web Application
Report Viewer HTML5 Report Viewer
Browsers Google Chrome, Firefox


Export operations initiated through the HTML5 Viewer results in ERR_CONNECTION_RESET error in Firefox and Chrome browsers when Telerik UI for ASP.NET AJAX RadCompression is enabled.

Error Message


This site can't be reached.

The connection was reset.


Telerik UI for ASP.NET AJAX RadCompression is enabled for the Reporting REST Service endpoint.


Disable the RadCompression to the Reporting REST service(WebAPI based) to receive documents bytes in the client (Viewer).

    <sectionGroup name="telerik.web.ui">
      <section name="radCompression" type="Telerik.Web.UI.RadCompressionConfigurationSection, Telerik.Web.UI, PublicKeyToken=121fae78165ba3d4" allowDefinition="MachineToApplication" requirePermission="false"/>

        <add handlerPath="api/reports/" matchExact="false"/>

Where the handlerPath should point to the Reporting REST Service - the HTML5 Viewer's serviceUrl.

For more information about the above configuration, please follow the RadCompression help article.

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