Fatal error: Uncaught TypeError: ftp_nlist(): Argument #1 ($ftp) must be of type FTP\Connection, null given in /var/www/html/wp-admin/includes/class-wp-filesystem-ftpext.php:438 Stack trace: #0 /var/www/html/wp-admin/includes/class-wp-filesystem-ftpext.php(438): ftp_nlist() #1 /var/www/html/wp-content/plugins/my-calendar/my-calendar-categories.php(1455): WP_Filesystem_FTPext->exists() #2 /var/www/html/wp-content/plugins/my-calendar/my-calendar-categories.php(1384): mc_generate_category_icon() #3 /var/www/html/wp-content/plugins/my-calendar/my-calendar-templates.php(544): mc_category_icon() #4 /var/www/html/wp-content/plugins/my-calendar/my-calendar-output.php(120): mc_create_tags() #5 /var/www/html/wp-content/plugins/my-calendar/my-calendar-output.php(2241): my_calendar_draw_events() #6 /var/www/html/wp-content/plugins/my-calendar/my-calendar-shortcodes.php(97): my_calendar() #7 /var/www/html/wp-includes/shortcodes.php(433): my_calendar_insert() #8 [internal function]: do_shortcode_tag() #9 /var/www/html/wp-includes/shortcodes.php(273): preg_replace_callback() #10 /var/www/html/wp-includes/class-wp-hook.php(324): do_shortcode() #11 /var/www/html/wp-includes/plugin.php(205): WP_Hook->apply_filters() #12 /var/www/html/wp-includes/post-template.php(256): apply_filters() #13 /var/www/html/wp-content/themes/empires/page.php(41): the_content() #14 /var/www/html/wp-includes/template-loader.php(106): include('...') #15 /var/www/html/wp-blog-header.php(19): require_once('...') #16 /var/www/html/index.php(17): require('...') #17 {main} thrown in /var/www/html/wp-admin/includes/class-wp-filesystem-ftpext.php on line 438