Subscribe to our newsletter’ label not showing on check out page

The beaver builder support team gave me the response below to this issue:

There’s some kind of weird Astra effect that applies to Labels. Have a look at the screenshot attached. If you disable the opacity CSS from Astra all of the label’s show up. I would recommend checking with Asta on how to disable this or at least disable it for the subscribe checkbox label.

From the astra team support team I got the below response (1) to this problem:

You can add this CSS to remove the opacity from the field.

.ast-checkout-labels-as-placeholders form #customer_details .form-row label {
opacity: 1 !important;
}

This seems the solution, the text now indeed appears. but all other labels now appear double

From the astra team support team I got the below response (2) to this problem:

It will require you to modify the template, so you need the code you can find on this page. The code needs to be added to the Child theme functions.php.

I put this in the child, functions.php and nothing happens. If I add previous code to the css anyway, the same results are created, double texts

From the astra team support team I got the below response (3) to this problem:

This is because it’s a Woocommerce template, and the code might not be working anymore, so I will be suggesting you to head out to Woocommerce support directly for more accurate assistance.

Please note that with every update of the plugins, the code’s compatibility sometimes doesn’t work anymore due to changes that Woocommerce did so that you can contact them directly.

Who could help me now, because I don’t know anymore ??

The page I need help with: [log in to see the link]