Fatal error: Uncaught TypeError: menu_class::urlencode(): Argument #1 ($url) must be of type string, null given, called in /mnt/web717/a1/92/570583392/htdocs/website/lib/classes/artikel_class.php on line 1095 and defined in /mnt/web717/a1/92/570583392/htdocs/website/lib/classes/menu_class.php:1974
Stack trace:
#0 /mnt/web717/a1/92/570583392/htdocs/website/lib/classes/artikel_class.php(1095): menu_class->urlencode()
#1 /mnt/web717/a1/92/570583392/htdocs/website/lib/classes/artikel_class.php(120): artikel_class->check_artikel()
#2 /mnt/web717/a1/92/570583392/htdocs/website/all_inc_front.php(64): artikel_class->make_inhalt()
#3 /mnt/web717/a1/92/570583392/htdocs/website/index.php(17): require_once('...')
#4 {main}
  thrown in /mnt/web717/a1/92/570583392/htdocs/website/lib/classes/menu_class.php on line 1974