Integrat on "[Plugin: Polylang] Languaje Switcher doesn't appear in Menu page"

Hi everyone,

I've already created the languages, even some pages with content in different languages.

I've also created some Menus, but the Switcher isn't there. I used it before and this never happened.

Does anybody know how to fix it?

Thanks in advance.

https://wordpress.org/plugins/polylang/