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(NULL, '/var/www/html/') #1 /var/www/html/wp-admin/includes/class-wp-filesystem-base.php(231): WP_Filesystem_FTPext->exists('/var/www/html/') #2 /var/www/html/wp-admin/includes/class-wp-filesystem-base.php(58): WP_Filesystem_Base->find_folder('/var/www/html/') #3 /var/www/html/wp-content/plugins/sg-cachepress/core/Htaccess/Htaccess.php(114): WP_Filesystem_Base->abspath() #4 /var/www/html/wp-content/plugins/sg-cachepress/core/Htaccess/Htaccess.php(81): SiteGround_Optimizer\Htaccess\Htaccess->set_htaccess_path() #5 /var/www/html/wp-content/plugins/sg-cachepress/core/Install_Service/Install_5_0_0.php(29): SiteGround_Optimizer\Htaccess\Htaccess->__construct() #6 /var/www/html/wp-content/plugins/sg-cachepress/core/Install_Service/Install_Service.php(60): SiteGround_Optimizer\Install_Service\Install_5_0_0->__construct() #7 /var/www/html/wp-content/plugins/sg-cachepress/core/Helper/Factory_Trait.php(32): SiteGround_Optimizer\Install_Service\Install_Service->__construct() #8 /var/www/html/wp-content/plugins/sg-cachepress/core/Loader/Loader.php(208): SiteGround_Optimizer\Loader\Loader->factory('install_service', 'install_service') #9 /var/www/html/wp-content/plugins/sg-cachepress/core/Loader/Loader.php(118): SiteGround_Optimizer\Loader\Loader->load_dependencies() #10 /var/www/html/wp-content/plugins/sg-cachepress/sg-cachepress.php(73): SiteGround_Optimizer\Loader\Loader->__construct() #11 /var/www/html/wp-settings.php(522): include_once('/var/www/html/w...') #12 /var/www/html/wp-config.php(102): require_once('/var/www/html/w...') #13 /var/www/html/wp-load.php(50): require_once('/var/www/html/w...') #14 /var/www/html/wp-blog-header.php(13): require_once('/var/www/html/w...') #15 /var/www/html/index.php(17): require('/var/www/html/w...') #16 {main} thrown in /var/www/html/wp-admin/includes/class-wp-filesystem-ftpext.php on line 438