Adding CSS script in announcement banner showing Blank page

[Bunty]

Hello All,

After adding below CSS script in the announcement banner we are not able to browse any thing it just showing blank pages.

https://community.atlassian.com/t5/Jira-questions/Customize-Jira-with-my-own-css/qaq-p/546361

<style type="text/css">#details-profile-fragment {
display: none;
}</style>

 Does any one faced same situation?

Thanks in Advance,

Bunty