Sidebar does not appear on subpages

As in the title. I have a problem with a sidebar. It is visible on the main page, it can also be seen on the post page. Unfortunately on the subpages only the upper part can be seen – a thin, gray strip.
Just like here:
https://psp1.home.pl/autoinstalator/wordpress3/?page_id=45

(Top Content Area 1,2,3 I hid alone. Sidebar disappeared before I installed “Widget Options”.)

• This topic was modified 7 years, 3 months ago by hallgerd.

The page I need help with: [log in to see the link]