Admin bar is disabled in front

First check admin bar is showing in WP admin. So go to :

Users -> YOUR_PROFILE

One of the check boxes : “Show Toolbar when viewing site” — make sure that’s checked on .

Then if it’s ok add this code to your functions.php :

function admin_bar(){

  if(is_user_logged_in()){
         add_filter( 'show_admin_bar', '__return_true' , 1000 );
    }
}
add_action('init', 'admin_bar' );