Fatal error: Uncaught Error: Call to undefined function wp_generate_password() in /var/www/html/wp-admin/includes/file.php:690 Stack trace: #0 /var/www/html/wp-admin/includes/class-wp-filesystem-ftpext.php(138): wp_tempnam('/var/www/html/w...') #1 /var/www/html/wp-content/plugins/responsive-menu/v4.0.0/inc/classes/class-theme-manager.php(436): WP_Filesystem_FTPext->get_contents('/var/www/html/w...') #2 /var/www/html/wp-content/plugins/responsive-menu/v4.0.0/inc/classes/class-theme-manager.php(850): RMP\Features\Inc\Theme_Manager->get_themes_from_uploads() #3 /var/www/html/wp-content/plugins/responsive-menu/responsive-menu.php(170): RMP\Features\Inc\Theme_Manager->get_menu_active_themes() #4 /var/www/html/wp-content/plugins/responsive-menu/responsive-menu.php(185): rm_includes_menu_theme_template() #5 /var/www/html/wp-settings.php(473): include_once('/var/www/html/w...') #6 /var/www/html/wp-config.php(95): require_once('/var/www/html/w...') #7 /var/www/html/wp-load.php(50): require_once('/var/www/html/w...') #8 /var/www/ht in /var/www/html/wp-admin/includes/file.php on line 690