To solve the error message please follow the below instructions:
1) Open Internet Explorer
2) Click on Tools
3) Click on Internet Options
4) Click on the the Security Tab
5) In the Box "Select a Zone to view or change security setting" click on the icon "Internet"
6) At the bottom of the page click on "Custom Level" ,a new page will show up
7) Scroll down the list and look for an option named "Display mixed content" and tick the voice "enabled"