Fatal error: Uncaught TypeError: explode(): Argument #2 ($string) must be of type string, null given in /srv/www/htdocs/kub.berlin/www.kub-berlin.org/xi/negotiation.php:6
Stack trace:
#0 /srv/www/htdocs/kub.berlin/www.kub-berlin.org/xi/negotiation.php(6): explode()
#1 /srv/www/htdocs/kub.berlin/www.kub-berlin.org/xi/negotiation.php(36): parse_accept_language()
#2 /srv/www/htdocs/kub.berlin/www.kub-berlin.org/xi/negotiation.php(40): get_preferred_language()
#3 {main}
thrown in /srv/www/htdocs/kub.berlin/www.kub-berlin.org/xi/negotiation.php on line 6