Error. Click for Details - While accessing names.nsf over Browser

All my users are facing issues while accessing names.nsf over a web browser. They get warning (Yes or N0) and no matter what you click on it results in Error - http://postimg.org/image/ezhvlpx7x/

I have tried checking Java settings as specified in http://www.java.com/en/download/help/error_mixedcode.xml but it didn’t work.

This is happening on XP, Win 7 machines and I have already tried many browsers.

Please help.

Subject: Solution

Change Java settings in control panel

Security tab - change it from high to medium

Re-launch brwoser