Fatal error: Uncaught Error: Call to undefined function wp_generate_password() in /wp-admin/includes/file.php:185 Stack trace: #0 /wp-admin/includes/class-wp-filesystem-ftpext.php(116): wp_tempnam('/wp-content/plu...') #1 /wp-content/plugins/responsive-menu/v4.0.0/inc/classes/class-theme-manager.php(436): WP_Filesystem_FTPext->get_contents('/wp-content/plu...') #2 /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 /wp-content/plugins/responsive-menu/responsive-menu.php(170): RMP\Features\Inc\Theme_Manager->get_menu_active_themes() #4 /wp-content/plugins/responsive-menu/responsive-menu.php(185): rm_includes_menu_theme_template() #5 /wp-settings.php(273): include_once('/wp-content/plu...') #6 /wp-config.php(92): require_once('/wp-settings.ph...') #7 /wp-load.php(39): require_once('/wp-config.php') #8 /wp-blog-header.php(13): require_once('/wp-load.php') #9 /index.php(17): require('/wp-blog-header...') #10 {main} thrown in /wp-admin/includes/file.php on line 185