Upgrade issue

You will need to upgrade manually
https://codex.www.ads-software.com/Upgrading_WordPress_Extended

it’s still a permissions problem. if you’re using unix try making sure that the files in your wordpress install are owned by the same owner that runs www (such as apache).

also you can try adding this to the bottom of wp-config.php:

if(is_admin()) {
	add_filter('filesystem_method', create_function('$a', 'return "direct";' ));
	define( 'FS_CHMOD_DIR', 0751 );
}