Fatal error: Uncaught Error: Call to undefined function trailingslashit() in /home3/irunoaqf/public_html/wp-includes/class-wp-textdomain-registry.php:103
Stack trace:
#0 /home3/irunoaqf/public_html/wp-includes/l10n.php(784): WP_Textdomain_Registry->set('default', 'fa_IR', '/home3/irunoaqf...')
#1 /home3/irunoaqf/public_html/wp-includes/load.php(1401): load_textdomain('default', '/home3/irunoaqf...', 'fa_IR')
#2 /home3/irunoaqf/public_html/wp-includes/load.php(278): wp_load_translations_early()
#3 /home3/irunoaqf/public_html/wp-settings.php(75): wp_maintenance()
#4 /home3/irunoaqf/public_html/wp-config.php(163): require_once('/home3/irunoaqf...')
#5 /home3/irunoaqf/public_html/wp-load.php(50): require_once('/home3/irunoaqf...')
#6 /home3/irunoaqf/public_html/wp-blog-header.php(13): require_once('/home3/irunoaqf...')
#7 /home3/irunoaqf/public_html/index.php(17): require('/home3/irunoaqf...')
#8 {main}
thrown in /home3/irunoaqf/public_html/wp-includes/class-wp-textdomain-registry.php on line 103