Fatal error: Uncaught Error: Call to undefined function str_contains() in C:\xampp\htdocs\wp-includes\default-constants.php:121 Stack trace: #0 C:\xampp\htdocs\wp-settings.php(61): wp_initial_constants() #1 C:\xampp\htdocs\wp-config.php(96): require_once('C:\\xampp\\htdocs...') #2 C:\xampp\htdocs\wp-load.php(50): require_once('C:\\xampp\\htdocs...') #3 C:\xampp\htdocs\wp-blog-header.php(13): require_once('C:\\xampp\\htdocs...') #4 C:\xampp\htdocs\index.php(19): require('C:\\xampp\\htdocs...') #5 {main} thrown in C:\xampp\htdocs\wp-includes\default-constants.php on line 121