Fatal error: Uncaught TypeError: Return value of Cart::getID() must be of the type int, null returned in /data/web/virtuals/244602/virtual/www/domains/datj.cz/app/core/classes/class-cart.php:524 Stack trace: #0 /data/web/virtuals/244602/virtual/www/domains/datj.cz/app/core/classes/class-user.php(74): Cart->getID() #1 /data/web/virtuals/244602/virtual/www/domains/datj.cz/app/core/data/data-header.php(257): User->initCarts() #2 /data/web/virtuals/244602/virtual/www/domains/datj.cz/index.php(8): require_once('/data/web/virtu...') #3 {main} thrown in /data/web/virtuals/244602/virtual/www/domains/datj.cz/app/core/classes/class-cart.php on line 524