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Error in Internet Explorer "Only secure content is displayed"


Product Progress® Telerik® Reporting
Report Viewer HTML5-based Report Viewers
Browser Internet Explorer


The HTML5 Viewer is a client-side widget consisting of Kendo UI widgets and functionality for communicating with a Telerik Reporting RESt service instance. The Ui and the functionality are added via JavaScript and CSS files loaded on the same page. The error is thrown when you try to load a page with the HTML5 Viewer.

Error Message

 "Only secure content is displayed"  


If you use an IFRAME element to load the page with the HTML5 Viewer, and all requests are issued over HTTPS, the error can occur due to a left link that uses HTTP.


The issue can be detected by running the page in Internet Explorer with opened Console (F12 Developer Tools). In the error logs you will see a message like the following:

HTTPS security is compromised by

This will hint you which CSS/JS files are requested over HTTP.

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