I’m not showing any Site Redirect upgrade under the account you’re logged into.
Can you let us know what the URL is of the site where you’re having this problem? Once we have that information, we’ll be better able to advise.
NOTE: We can only assist with websites hosted here at WordPress.com. If you’re using the WordPress software, but hosted elsewhere, you will need to reach out to your hosting provider or the WordPress.org community for guidance: