Hi!
I actually have the same problem but I can’t install any plug-ins.
I tried to add
if(is_admin()) {
add_filter('filesystem_method', create_function('$a', 'return "direct";' ));
define( 'FS_CHMOD_DIR', 0751 );
}
I could upload the edited wp-config.php but after that I can’t log-in cause it detects it as error.
If there is no solution how can I install manually the plug-ins by ftp or a file manager?
Thanks in advance.