Fatal error: Uncaught Error: Undefined constant "IDIOMA" in C:\Inetpub\vhosts\tees.es\public\includes\header.php:10 Stack trace: #0 C:\Inetpub\vhosts\tees.es\public\checkout.php(22): require_once() #1 {main} thrown in C:\Inetpub\vhosts\tees.es\public\includes\header.php on line 10