Alignment Issues on Home Page

Hello, WP users! I have recently started editing my family’s website, as I’m a newbie in this field of expertise.
On short, I wanted to embed an article on the Home Page, but I believe I clicked on sth or did sth and now, in the Editing Page mode, I can see a gray band/thick (vertical) line on the right side of the screen. It looks terrible, but what’s worse, is that the gallery block on the Home Page is now pretty asymmetrical. You can check it for yourself on our website.

P.S.: IF it helps, I think the “edit-post-visual-editor editor-styles-wrapper” is about 80% of the entire block editor’s width.

• This topic was modified 4 years, 11 months ago by Jan Dembowski. Reason: Moved to Fixing WordPress from Everything else WordPress

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