Uncaught TypeError: Argument 1 passed to WPML\Element\API\Languages::WPML\Element\API\{closure}… when selecting all languages from admin language switcher

Status: Resolved
Reported for: WPML Multilingual CMS 4.4.10
Resolved in: 4.4.11

Overview of the issue

If you go to your WordPress site’s user profile, WPML enables the option to Set admin language as editing language .

However, if you select this option but you also select the All languages from the top bar language switcher you will get this error:

Uncaught TypeError: Argument 1 passed to WPMLElementAPILanguages::WPMLElementAPI{closure}() must be of the type array, bool given in /wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/core-api/core/Languages.php:205

This combination of settings causes an error

Workaround

Please edit your site’s user profile and uncheck the Set admin language as editing language option.

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