Fatal error: Uncaught Error: Call to undefined function trailingslashit() in /home/jivanfactory/public_html/wp-includes/class-wp-textdomain-registry.php:103 Stack trace: #0 /home/jivanfactory/public_html/wp-includes/l10n.php(784): WP_Textdomain_Registry->set('default', 'fa_IR', '/home/jivanfact...') #1 /home/jivanfactory/public_html/wp-includes/load.php(1401): load_textdomain('default', '/home/jivanfact...', 'fa_IR') #2 /home/jivanfactory/public_html/wp-includes/load.php(162): wp_load_translations_early() #3 /home/jivanfactory/public_html/wp-settings.php(37): wp_check_php_mysql_versions() #4 /home/jivanfactory/public_html/wp-config.php(164): require_once('/home/jivanfact...') #5 /home/jivanfactory/public_html/wp-load.php(50): require_once('/home/jivanfact...') #6 /home/jivanfactory/public_html/wp-blog-header.php(13): require_once('/home/jivanfact...') #7 /home/jivanfactory/public_html/index.php(17): require('/home/jivanfact...') #8 {main} thrown in /home/jivanfactory/public_html/wp-includes/class-wp-textdomain-registry.php on line 103