Update Failed: Failed to connect to FTP Server 127.0.0.1:21

Wordpress Plugin Update Failed | Failed to connect to FTP Server 127.0.0.1:21

While updating plugin if you encounter the error "Update Failed: Failed to connect to FTP Server 127.0.0.1:21", than you can try the following solution:

Check File permissions

All directory should have 755 permission and should be owned by the user running the appropriate user.

sudo chown www-data:www-data * -R 
sudo usermod -a -G www-data username

Change FS_METHOD to "direct"

In wp-config.php file change FS_METHOD to "direct"

define('FS_METHOD', 'direct');

Remove Bitnami configuration

If you have migrated your wordpress site from bitnami to self hosted website than remove the following piece of configuration from wp-config.php and restart the php-fpm and webserver(nginx).

/*define('FS_METHOD', 'ftpext');
define('FTP_BASE', '/opt/bitnami/apps/wordpress/htdocs/');
define('FTP_USER', 'bitnamiftp');
define('FTP_PASS', 'XXXXXXXXXXXXXXXXXXXXXXXXX');
define('FTP_HOST', '127.0.0.1');
define('FTP_SSL', false);
*/