Fatal error: Uncaught TypeError: getVouchersForUser(): Argument #1 ($userId) must be of type int, null given, called in /mnt/web617/a0/40/510480240/htdocs/shop_neu/actions/voucherUse.php on line 5 and defined in /mnt/web617/a0/40/510480240/htdocs/shop_neu/function/orders.php:1356
Stack trace:
#0 /mnt/web617/a0/40/510480240/htdocs/shop_neu/actions/voucherUse.php(5): getVouchersForUser()
#1 /mnt/web617/a0/40/510480240/htdocs/shop_neu/routes.php(979): require_once('...')
#2 /mnt/web617/a0/40/510480240/htdocs/shop_neu/includes.php(24): require_once('...')
#3 /mnt/web617/a0/40/510480240/htdocs/shop_neu/index.php(19): require_once('...')
#4 {main}
  thrown in /mnt/web617/a0/40/510480240/htdocs/shop_neu/function/orders.php on line 1356