My embedded test pages have started to behave differently. This includes the one linked to in my previous post https://forum.abantecart.com/index.php/topic,10739.0.html
Previously the Add To Cart button opened the shopping cart, now it just adds to the total, showing the cart icon.

Hello. If the product includes options, the product page will be displayed. If there are no required options, the product is added to the cart as supposed to be for "Add To Cart button"

Hello.
Enable duplication of messages to admin so you at least can see sent messages https://abantecart.atlassian.net/wiki/spaces/AD/pages/6324254/Duplicate+Contact+Enquiries

And make sure you have captcha field added as default Contact form

Ah ok thanks Basara! That puts my mind at rest.

Any idea why one customers orders don't send any notifications? Usually should get one from the shop and from PayPal but neither get sent but PayPal money arrives.

Hello. Are you referring to the email that is sent out once the order has been confirmed?

hello,

I only edited a file on System/Localization/Languages Definitions/ mail_account_create   text_activate file

Can you be more specific? Which file exactly on email template you mean?

I mean Design > Email templates

Hello.
If you use a non-modified version of Authorize.Net make sure you have Fast checkout enabled. Additionally, when encountering an error, please inspect both the browser's console log and AbanteCart's error log for insights. Could you specify if the error appeared upon loading the payment page or after submitting the card details?

Hello.
Modify the /extensions/bootstrap5/storefront/view/bootstrap5/css/style.css
add CSS rules to the top of the page for example
.navbar.navbar-expand-md.navbar-dark.bg-dark {
    background-color: red !important;
}

Hello.
What is your AbanteCart version?