Why can't I connect the admin panel in Wordpress?

Question

WordPress

There is a code in functions.php where styles and scripts are connected. I understand that after connecting Jquery, the admin panel should appear on top (this is Wordpress), but it does not appear.

I did everything according to the video, here is the link and the moment where it all happens:
https://www.youtube.com/watch?v=_s4Jwf1ba24&t=6610s
minute 2:03:19.

Here is the code itself:

<?php

add_action( 'wp_enqueue_scripts', 'timber_style' );
add_action( 'wp_enqueue_scripts', 'timber_scripts' );

function timber_style() {
  wp_enqueue_style( 'normalize-style', get_template_directory_uri() . '/assets/css/normalize.css' );
  wp_enqueue_style( 'magnific-style', get_template_directory_uri() . '/assets/css/magnific-popup.css' );
  wp_enqueue_style( 'main-style', get_stylesheet_uri() );
}


function timber_scripts() {

  wp_deregister_script( 'jquery' );
  wp_register_script( 'jquery', ' https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js' );
  wp_enqueue_script( 'jquery' );


  wp_enqueue_script( 'magnific-script', get_template_directory_uri() . '/assets/js/jquery.magnific-popup.min.js', array(jquery), null, true );

  wp_enqueue_script( 'main-script', get_template_directory_uri() . '/assets/js/main.js', array(jquery), null, true );
}

Answer 1

add to the footer before the tag
<?php wp_footer(); ?>
</body>