Layout doesn't work

I use Chrome. Have the latest updates for WordPress, all themes, including yours 9.3. I spent hours going over your theme and was so impressed with the care you put into it, even the English is exemplary. At first I used Theme Test Drive to test the site, and when that didn’t work, I went directly to live activation. After spending hours setting it up, the very first thing, the layout, didn’t work. No matter what I did, the layout remained two columns with no sidebars. I tried every configuration. The only thing that worked was changing the overall size. What’s to be done?