Using page template for single posts

Hello,

I need help for solving a problem.
My client needs to create a news module, so I will use the posts in WordPress.

But when I create a single post, the header with the menu is broken, and I cannot find how to resolve this.

In the page template that I use, I add Template Post Type: post, page, product, single post, so I can select this template in my posts, but there’s no way to correctly show the header and menu as on other pages.

Thanks a lot

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