[Waiting for user confirmation] I can´t put key on my localhost wp page

Hi,

cURL error 60: SSL certificate problem: self-signed certificate in certificate chain is not specifically a WPML issue. It is a general cURL SSL verification issue that occurs when a PHP application (like WordPress) tries to make an HTTPS request but cannot verify the SSL certificate of the remote server.

The easiest solution is temporarily disabling SSL verification while working locally, then using a proper certificate when deploying to production.

Other than that you can try this:
https://wpml.org/faq/automatic-wpml-registration-using-php-for-easy-moves-between-production-development-and-staging/#how-do-i-set-a-different-site-key-for-each-environment

If you just need a quick workaround for development, you can disable SSL verification in WordPress by adding this to your theme’s functions.php file, something like:

add_action('http_api_curl', function($handle) {
    curl_setopt($handle, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($handle, CURLOPT_SSL_VERIFYHOST, false);
}, 10, 1);

Or you can force WordPress to ignore SSL issues by adding this to wp-config.php:

define( 'WP_HTTP_BLOCK_EXTERNAL', false );
define( 'WP_ACCESSIBLE_HOSTS', 'api.wordpress.org, *.wpml.org' );

There are other possible solutions such as updating your your CA certificate bundle, etc.

I haven't tested any of this though, as this is outside of the WPML scope, so it may not work.