Sidebar appearing below main content

I am using Gray Whale v1.06 page with sidebar page template. The problem is the sidebar appears below the main page content – not beside the content as expected. Researching this issue, I found this is typically due to an extra <div> or missing </div> somewhere before the get_sidebar call. However, I can’t seem to find how or where to fix it. Please help! Here is the page with the problem. https://echaintechnology.com/en/info/