How to fix error when attaching files to vp?

Question

HTML

Good day, when I link css and js files, I get an error, tell me how to fix it?

Answer 1

Include scripts and styles through functions.php according to the WP code
jquery does not need to be included. it is there by default. But if you want to connect your own, then you need to first deregister the current one.
Code example:

function register_styles_scripts() {
  //стили
  wp_register_style('style', get_template_directory_uri() .
    '/style.css');
  wp_enqueue_style('style');
  
  //скрипты
  wp_deregister_script('jquery');
  wp_register_script('jquery', get_template_directory_uri() .
    '/assets/js/jquery.js');
  wp_enqueue_script('jquery');
  
  wp_deregister_script('jquery.min');
  wp_register_script('jquery.min', get_template_directory_uri() .
    '/assets/js/jquery.min.js');
  wp_enqueue_script('jquery');

       wp_register_script('script', get_template_directory_uri() .
    '/assets/js/script.js');
  wp_enqueue_script('script');
}
add_action('wp_enqueue_scripts', 'register_styles_scripts');