Fatal error: Uncaught TypeError: Unsupported operand types: string - int in /www/tienda-virtual.com.ar/tienda-virtual.com.ar/public/Controllers/Principal.php:27 Stack trace: #0 /www/tienda-virtual.com.ar/tienda-virtual.com.ar/public/index.php(29): Principal->shop('assets,img,cs.p...') #1 {main} thrown in /www/tienda-virtual.com.ar/tienda-virtual.com.ar/public/Controllers/Principal.php on line 27