EDIT: The solution is here: https://slickmedia.co.uk/blog/theme-bar-shortcodes/
The shortcode for WPML Nav Menu stopped working with X theme here.
Visit the site at www.itdata.com.br. You will see “[wpml_language_selector_widget]” is shown in my header topbar content as text, instead of the menu with languages, flags, etc.
No change was done to the site and source code recently, so this has to be a side effect of some update.
I have fully reviewed the setup and made sure everything is up-to-date: OS, webserver, PHP and supporting libs, Wordpress, x-theme and WPML. The plugins are enabled.
Any help would be greatly appreciated.