WordPress 5.5.0 Beta version

How to test – define(‘WP_DEBUG’, true) and open one page or post.

Notice: register_rest_route was called incorrectly. The REST API route definition for wc/store/cart is missing the required permission_callback argument. For REST API routes that are intended to be public, use __return_true as the permission callback. Please see Debugging in WordPress for more information. (This message was added in version 5.5.0.) in C:\xampp\htdocs\1\wp-includes\functions.php on line 5219