Hello,
I did everything as it said on this topic. I deactivated the plugin. I installed a new wordpress with a new install of the theme. I tried to have a look at the suhosin value but it’s not activated on my hosting server. BUT IT DOESN’T WORK.
When I go to Appearance–>Menus and select the menu, when I save the page refresh and it’s not selected anymore and nothing happens on my website. Can you help please ?