Archive children categories description

Hi Pedro, great plugin!

I have a question for you.
In control panel when I put different description for different languages and save, the page print this messagge:
“Notice: Undefined index: [:it]Film e libri (e anche il contrario)[:en]Movies and books (and the opposite too)[:cs]Movies and books (and the opposite too)[:] in http://www.lalibraiazen.com/wp-content/plugins/qtranslate-slug/includes/class-qtranslate-slug.php on line 2188

Notice: Undefined index: [:it]Film e libri (e anche il contrario)[:en]Movies and books (and the opposite too)[:cs]Movies and books (and the opposite too)[:] in http://www.lalibraiazen.com/wp-content/plugins/qtranslate-slug/includes/class-qtranslate-slug.php on line 2188

Notice: Undefined index: [:it]Film e libri (e anche il contrario)[:en]Movies and books (and the opposite too)[:cs]Movies and books (and the opposite too)[:] in http://www.lalibraiazen.com/wp-content/plugins/qtranslate-slug/includes/class-qtranslate-slug.php on line 2188

Warning: Cannot modify header information – headers already sent by (output started at http://www.lalibraiazen.com/wp-content/plugins/qtranslate-slug/includes/class-qtranslate-slug.php:2188) in http://www.lalibraiazen.com/wp-includes/pluggable.php on line 1196″.

Is there a conflit between class-qtranslate-slug.php and wp-includes/pluggable.php?

Here you can watch an example:
http://www.lalibraiazen.com/indice/archivio-ita/

Do you see short-tag for different languages?

Many thanks for your help,
Andrea

p.s.
I see correctly the description in single category
an example: http://www.lalibraiazen.com/indice/archivio-ita/libri-gioiosi/

https://wordpress.org/plugins/qtranslate-slug/