How to solve wc-ajax error?

Question

WordPress

Good day, experts!
Site - https://raki96.rf I encountered
a problem when placing an order on the site WP(5.4.2)+WC(4.2.2)+Avada theme(5.9.1).
403 error on checkout page.


I've already broken my head.
How can this be fixed?

Answer 1

Most likely, just clearing cookies in the browser will save you.
You can also add this to wp-config.php:

define( 'ADMIN_COOKIE_PATH', '/' );
define( 'COOKIE_DOMAIN', '' );
define( 'COOKIEPATH', '' );
define( 'SITECOOKIEPATH', '' );

There is also an opinion on the Internet that the problem is related to redirection and SSL, this line helped some:

define( 'FORCE_SSL_ADMIN', true );
if ( strpos( $_SERVER['HTTP_X_FORWARDED_PROTO'], 'https' ) !== false ) {
  $_SERVER['HTTPS'] = 'on';
}

Well, it might also be worth adding this line to functions.php:

add_filter( 'wc_session_use_secure_cookie', '__return_true' );