Support Article
Icons or images do not display in IE11
SA-40801
Summary
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.
Resolution
Perform the following local-change:
Address the conflicting cache control directives.
Published May 9, 2019 - Updated October 8, 2020
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