Thread:Project:Support desk/MediaWiki Language Extension Bundle causes two issues on 20.2

I've installed http://www.mediawiki.org/wiki/MediaWiki_Language_Extension_Bundle and upgraded for 20.2 after this.

I've discovered that the extension that causes issues is UniversalLanguageSelector

I'm facing two issues:

1) When registered, after login, language div options doesn't render, so I can't change the language; 2) When registerd, when I go to preferences, it gets a bug Fatal exception of type MWException, and after debuging : Undefined index: api in includes/HTMLForm.php line 288

Can somebody please help me?

I'm lost...