Hello,
I used a template to create a site. On the left side, I have a navigation Menu, no navigation bar.
I have added a new page in my site and added a new line in my navigation menu.
When I publish, the link is working and I reach the right page, but I cannot come back to another page via the menu.
Once I'm on the second page, I cannot go on another page.
It looks like a "one way" travel to my new page.

The site: picnoir.eu. The concerned page is the second page. Other pages are working well.
(it's my sand box, not the final adress which will be an https)

Could someone give me a tip or an idea how I could resolve this please ?
Thanks.