Fatal error: Uncaught Error: Call to undefined function str_contains() in /home/vello2/domains/vello.com.tr/public_html/wp-includes/default-constants.php:121 Stack trace: #0 /home/vello2/domains/vello.com.tr/public_html/wp-settings.php(61): wp_initial_constants() #1 /home/vello2/domains/vello.com.tr/public_html/wp-config.php(79): require_once('/home/vello2/do...') #2 /home/vello2/domains/vello.com.tr/public_html/wp-load.php(50): require_once('/home/vello2/do...') #3 /home/vello2/domains/vello.com.tr/public_html/wp-login.php(12): require('/home/vello2/do...') #4 {main} thrown in /home/vello2/domains/vello.com.tr/public_html/wp-includes/default-constants.php on line 121