Google verification error

Hey.

First of all, thank you for creating this amazing plugin, I’m really enjoying it.

However, I have a problem with the google verification, I created the app and introduced the keys (client ID and Client Secret) but when I click the button Verify Settings and Log In with my google account, it shows a screen with this message.

Forbidden
You don’t have permission to access /wp-login.php on this server.

I tried to put in my .htaccess this:

<Files wp-login.php>
Order Deny,Allow
Deny from all
Allow from all
</Files>

But it didn’t work.

Can you help me?

Thank you in advance.