Weird white menu background

Hello,

The page blog doesn’t look like the about page, poftfolio nor contact.

This look perfect : https://maman-freelance.fr/about/
We can see the logo and the menu. The background is blue.

For the blog page, the background is white and we cannot see the logo nor the menu. I don’t understan why it doesn’t look like the other page.

Also in the breadcrumbs, there is twice “blog” : Accueil > Blog > Blog

I tried to figure out and fix the 2 things but without success.

I would love your help with this .

Thank you very much !

Kind regards

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