I solved my problem, everything is OK now. Thanks

You didn't send link

Sidebar can be disabled in theme option - global enable

I have been using many posts which I set Post layout (Full Width, optimized for reading...) - Pic 11.png, I believe that there are somethings not OK with your latest update.

The layout of pic (something 2.png) is normal ( the old version.)

The layout of pic (something 1.png) is not OK, the whole content is smaller than before and the sidebar appears as well (updated with the latest version.)

You can check my images below to know clearly.

Please help,

Solomen