Checked - storefront /includes/configure.php
define('HTTP_SERVER', 'https://vinyldecalsuperstore.com');
define('HTTPS_SERVER', 'https://vinyldecalsuperstore.com');
define('ENABLE_SSL', 'true');
looks good there.
Created the samesite_cookie.php and copied the code with no trailing blank line, then with a trailing blank line after the }, neither got me past the Whoops.
Thanks for looking Cindy!
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