Support Article

Icons or images do not display in IE11



Icons or images do not display on the Internet Explorer 11 browser.

Error Messages

Not Applicable

Steps to Reproduce

Log in to the portal using Internet Explorer 11 browser through a proxy.

Root Cause

Content security policies were in place for the proxy which modified the HTTP response header. One of the settings had both Pragma: no-cache and Cache-Control: max-age. These two cache settings conflicted with each other. The Internet Explorer 11 browser could not handle this contradiction gracefully.


Perform the following local-change:

Address the conflicting cache control directives.

Published May 9, 2019 - Updated October 8, 2020

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