Invisible sidebar

Hi,
On the main page I can not see the sidebar (in the settings everything is ok, I have the second same blog with the same template with the same settings and there the sidebar is ok), only when you click on a site, eg search -> searching anything, then the sidebar appears.
What can I do to make the sidebar display? I see that in appearance -> widgets -> there is a sidebar, then when I come into personalization -> widgets, then the sidebar does not have. In personalization -> general options -> checkbox “Enable Sidebar On Homepage” is checked. Please help