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Kendo could not be loaded automatically error.


Product Progress® Telerik® Reporting
Application Type Web Application
Report Viewer HTML5 Report Viewers


The error is displayed in the browser console when the report viewer loads.

'The Reporting REST Service cannot be accessed' message appears in the report viewer.

Error Message

  • On the page, in the report viewer:
Cannot access the Reporting REST service. (serviceUrl = '/api/reports'). 
Make sure the service address is correct and enable CORS if needed. (
  • In the browser console:
Kendo could not be loaded automatically. Make sure 'options.serviceUrl' / 'options.reportServer.url' is correct and accessible.
The error is: undefined


A slim build of jQuery is referenced on the page. The slim version saves weight by excluding the ajax and effects modules.


Reference a compressed(min) or an uncompressed version of the full jQuery(minimum required version 1.9.1).

See Also

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