Tried to generate WebHelp, but when I allowed block content the TOC and topics disappear on the left.

I am using RoboHelp 9 and IE11. I tried to compile my project using WebHelp as my primary layout. When it opens I see that the TOC and topics are listed on the left, but when I click to allow blocked content, all of a sudden the TOC and topics disappeared. I do not know how I can make them show up. Here is the screenshot of what I get. Please help. Thank you!