Fatal error: Uncaught Error: Failed opening required '/home/mubasher/public_html/wp-includes/class-walker-category.php' (include_path='.:/opt/alt/php82/usr/share/pear:/opt/alt/php82/usr/share/php:/usr/share/pear:/usr/share/php') in /home/mubasher/public_html/wp-settings.php:221 Stack trace: #0 /home/mubasher/public_html/wp-config.php(81): require_once() #1 /home/mubasher/public_html/wp-load.php(50): require_once('/home/mubasher/...') #2 /home/mubasher/public_html/wp-blog-header.php(13): require_once('/home/mubasher/...') #3 /home/mubasher/public_html/index.php(17): require('/home/mubasher/...') #4 {main} thrown in /home/mubasher/public_html/wp-settings.php on line 221

Fatal error: Uncaught Error: Call to a member function set() on null in /home/mubasher/public_html/wp-includes/l10n.php:856 Stack trace: #0 /home/mubasher/public_html/wp-includes/l10n.php(959): load_textdomain() #1 /home/mubasher/public_html/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain() #2 [internal function]: WP_Fatal_Error_Handler->handle() #3 {main} thrown in /home/mubasher/public_html/wp-includes/l10n.php on line 856