i am installed a theme for wordpress ..but now showing the warning messege

warning message :-

[02-Feb-2024 04:20:19 UTC] PHP Warning: Attempt to read property “before” on array in /home/favoursh/public_html/wp-includes/class-walker-nav-menu.php on line 273
[02-Feb-2024 04:20:19 UTC] PHP Warning: Attempt to read property “link_before” on array in /home/favoursh/public_html/wp-includes/class-walker-nav-menu.php on line 275
[02-Feb-2024 04:20:19 UTC] PHP Warning: Attempt to read property “link_after” on array in /home/favoursh/public_html/wp-includes/class-walker-nav-menu.php on line 275
[02-Feb-2024 04:20:19 UTC] PHP Warning: Attempt to read property “after” on array in /home/favoursh/public_html/wp-includes/class-walker-nav-menu.php on line 277

nav menu

<?php
/**
 * Nav Menu API: Walker_Nav_Menu class
 *
 * @package WordPress
 * @subpackage Nav_Menus
 * @since 4.6.0
 */

/**
 * Core class used to implement an HTML list of nav menu items.
 *
 * @since 3.0.0
 *
 * @see Walker
 */
class Walker_Nav_Menu extends Walker {
    /**
     * What the class handles.
     *
     * @since 3.0.0
     * @var string
     *
     * @see Walker::$tree_type
     */
    public $tree_type = array( 'post_type', 'taxonomy', 'custom' );

    /**
     * Database fields to use.
     *
     * @since 3.0.0
     * @todo Decouple this.
     * @var string[]
     *
     * @see Walker::$db_fields
     */
    public $db_fields = array(
        'parent' => 'menu_item_parent',
        'id'     => 'db_id',
    );

    /**
     * Starts the list before the elements are added.
     *
     * @since 3.0.0
     *
     * @see Walker::start_lvl()
     *
     * @param string   $output Used to append additional content (passed by reference).
     * @param int      $depth  Depth of menu item. Used for padding.
     * @param stdClass $args   An object of wp_nav_menu() arguments.
     */
    public function start_lvl( &$output, $depth = 0, $args = null ) {
        if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
            $t="";
            $n = '';
        } else {
            $t = "\t";
            $n = "\n";
        }
        $indent = str_repeat( $t, $depth );

        // Default class.
        $classes = array( 'sub-menu' );

        /**
         * Filters the CSS class(es) applied to a menu list element.
         *
         * @since 4.8.0
         *
         * @param string[] $classes Array of the CSS classes that are applied to the menu `<ul>` element.
         * @param stdClass $args    An object of `wp_nav_menu()` arguments.
         * @param int      $depth   Depth of menu item. Used for padding.
         */
        $class_names = implode( ' ', apply_filters( 'nav_menu_submenu_css_class', $classes, $args, $depth ) );

        $atts          = array();
        $atts['class'] = ! empty( $class_names ) ? $class_names : '';

        /**
         * Filters the HTML attributes applied to a menu list element.
         *
         * @since 6.3.0
         *
         * @param array $atts {
         *     The HTML attributes applied to the `<ul>` element, empty strings are ignored.
         *
         *     @type string $class    HTML CSS class attribute.
         * }
         * @param stdClass $args      An object of `wp_nav_menu()` arguments.
         * @param int      $depth     Depth of menu item. Used for padding.
         */
        $atts       = apply_filters( 'nav_menu_submenu_attributes', $atts, $args, $depth );
        $attributes = $this->build_atts( $atts );

        $output .= "{$n}{$indent}<ul{$attributes}>{$n}";
    }

    /**
     * Ends the list of after the elements are added.
     *
     * @since 3.0.0
     *
     * @see Walker::end_lvl()
     *
     * @param string   $output Used to append additional content (passed by reference).
     * @param int      $depth  Depth of menu item. Used for padding.
     * @param stdClass $args   An object of wp_nav_menu() arguments.
     */
    public function end_lvl( &$output, $depth = 0, $args = null ) {
        if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
            $t="";
            $n = '';
        } else {
            $t = "\t";
            $n = "\n";
        }
        $indent  = str_repeat( $t, $depth );
        $output .= "$indent</ul>{$n}";
    }

    /**
     * Starts the element output.
     *
     * @since 3.0.0
     * @since 4.4.0 The {@see 'nav_menu_item_args'} filter was added.
     * @since 5.9.0 Renamed `$item` to `$data_object` and `$id` to `$current_object_id`
     *              to match parent class for PHP 8 named parameter support.
     *
     * @see Walker::start_el()
     *
     * @param string   $output            Used to append additional content (passed by reference).
     * @param WP_Post  $data_object       Menu item data object.
     * @param int      $depth             Depth of menu item. Used for padding.
     * @param stdClass $args              An object of wp_nav_menu() arguments.
     * @param int      $current_object_id Optional. ID of the current menu item. Default 0.
     */
    public function start_el( &$output, $data_object, $depth = 0, $args = null, $current_object_id = 0 ) {
        // Restores the more descriptive, specific name for use within this method.
        $menu_item = $data_object;

        if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
            $t="";
            $n = '';
        } else {
            $t = "\t";
            $n = "\n";
        }
        $indent = ( $depth ) ? str_repeat( $t, $depth ) : '';

        $classes   = empty( $menu_item->classes ) ? array() : (array) $menu_item->classes;
        $classes[] = 'menu-item-' . $menu_item->ID;

        /**
         * Filters the arguments for a single nav menu item.
         *
         * @since 4.4.0
         *
         * @param stdClass $args      An object of wp_nav_menu() arguments.
         * @param WP_Post  $menu_item Menu item data object.
         * @param int      $depth     Depth of menu item. Used for padding.
         */
        $args = apply_filters( 'nav_menu_item_args', $args, $menu_item, $depth );

        /**
         * Filters the CSS classes applied to a menu item's list item element.
         *
         * @since 3.0.0
         * @since 4.1.0 The `$depth` parameter was added.
         *
         * @param string[] $classes   Array of the CSS classes that are applied to the menu item's `<li>` element.
         * @param WP_Post  $menu_item The current menu item object.
         * @param stdClass $args      An object of wp_nav_menu() arguments.
         * @param int      $depth     Depth of menu item. Used for padding.
         */
        $class_names = implode( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $menu_item, $args, $depth ) );

        /**
         * Filters the ID attribute applied to a menu item's list item element.
         *
         * @since 3.0.1
         * @since 4.1.0 The `$depth` parameter was added.
         *
         * @param string   $menu_item_id The ID attribute applied to the menu item's `<li>` element.
         * @param WP_Post  $menu_item    The current menu item.
         * @param stdClass $args         An object of wp_nav_menu() arguments.
         * @param int      $depth        Depth of menu item. Used for padding.
         */
        $id = apply_filters( 'nav_menu_item_id', 'menu-item-' . $menu_item->ID, $menu_item, $args, $depth );

        $li_atts          = array();
        $li_atts['id']    = ! empty( $id ) ? $id : '';
        $li_atts['class'] = ! empty( $class_names ) ? $class_names : '';

        /**
         * Filters the HTML attributes applied to a menu's list item element.
         *
         * @since 6.3.0
         *
         * @param array $li_atts {
         *     The HTML attributes applied to the menu item's `<li>` element, empty strings are ignored.
         *
         *     @type string $class        HTML CSS class attribute.
         *     @type string $id           HTML id attribute.
         * }
         * @param WP_Post  $menu_item The current menu item object.
         * @param stdClass $args      An object of wp_nav_menu() arguments.
         * @param int      $depth     Depth of menu item. Used for padding.
         */
        $li_atts       = apply_filters( 'nav_menu_item_attributes', $li_atts, $menu_item, $args, $depth );
        $li_attributes = $this->build_atts( $li_atts );

        $output .= $indent . '<li' . $li_attributes . '>';

        $atts           = array();
        $atts['title']  = ! empty( $menu_item->attr_title ) ? $menu_item->attr_title : '';
        $atts['target'] = ! empty( $menu_item->target ) ? $menu_item->target : '';
        if ( '_blank' === $menu_item->target && empty( $menu_item->xfn ) ) {
            $atts['rel'] = 'noopener';
        } else {
            $atts['rel'] = $menu_item->xfn;
        }

        if ( ! empty( $menu_item->url ) ) {
            if ( get_privacy_policy_url() === $menu_item->url ) {
                $atts['rel'] = empty( $atts['rel'] ) ? 'privacy-policy' : $atts['rel'] . ' privacy-policy';
            }

            $atts['href'] = $menu_item->url;
        } else {
            $atts['href'] = '';
        }

        $atts['aria-current'] = $menu_item->current ? 'page' : '';

        /**
         * Filters the HTML attributes applied to a menu item's anchor element.
         *
         * @since 3.6.0
         * @since 4.1.0 The `$depth` parameter was added.
         *
         * @param array $atts {
         *     The HTML attributes applied to the menu item's `<a>` element, empty strings are ignored.
         *
         *     @type string $title        Title attribute.
         *     @type string $target       Target attribute.
         *     @type string $rel          The rel attribute.
         *     @type string $href         The href attribute.
         *     @type string $aria-current The aria-current attribute.
         * }
         * @param WP_Post  $menu_item The current menu item object.
         * @param stdClass $args      An object of wp_nav_menu() arguments.
         * @param int      $depth     Depth of menu item. Used for padding.
         */
        $atts       = apply_filters( 'nav_menu_link_attributes', $atts, $menu_item, $args, $depth );
        $attributes = $this->build_atts( $atts );

        /** This filter is documented in wp-includes/post-template.php */
        $title = apply_filters( 'the_title', $menu_item->title, $menu_item->ID );

        /**
         * Filters a menu item's title.
         *
         * @since 4.4.0
         *
         * @param string   $title     The menu item's title.
         * @param WP_Post  $menu_item The current menu item object.
         * @param stdClass $args      An object of wp_nav_menu() arguments.
         * @param int      $depth     Depth of menu item. Used for padding.
         */
        $title = apply_filters( 'nav_menu_item_title', $title, $menu_item, $args, $depth );

        $item_output  = $args->before;
        $item_output .= '<a' . $attributes . '>';
        $item_output .= $args->link_before . $title . $args->link_after;
        $item_output .= '</a>';
        $item_output .= $args->after;


        /**
         * Filters a menu item's starting output.
         *
         * The menu item's starting output only includes `$args->before`, the opening `<a>`,
         * the menu item's title, the closing `</a>`, and `$args->after`. Currently, there is
         * no filter for modifying the opening and closing `<li>` for a menu item.
         *
         * @since 3.0.0
         *
         * @param string   $item_output The menu item's starting HTML output.
         * @param WP_Post  $menu_item   Menu item data object.
         * @param int      $depth       Depth of menu item. Used for padding.
         * @param stdClass $args        An object of wp_nav_menu() arguments.
         */
        $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $menu_item, $depth, $args );
    }

    /**
     * Ends the element output, if needed.
     *
     * @since 3.0.0
     * @since 5.9.0 Renamed `$item` to `$data_object` to match parent class for PHP 8 named parameter support.
     *
     * @see Walker::end_el()
     *
     * @param string   $output      Used to append additional content (passed by reference).
     * @param WP_Post  $data_object Menu item data object. Not used.
     * @param int      $depth       Depth of page. Not Used.
     * @param stdClass $args        An object of wp_nav_menu() arguments.
     */
    public function end_el( &$output, $data_object, $depth = 0, $args = null ) {
        if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
            $t="";
            $n = '';
        } else {
            $t = "\t";
            $n = "\n";
        }
        $output .= "</li>{$n}";
    }

    /**
     * Builds a string of HTML attributes from an array of key/value pairs.
     * Empty values are ignored.
     *
     * @since 6.3.0
     *
     * @param  array $atts Optional. An array of HTML attribute key/value pairs. Default empty array.
     * @return string A string of HTML attributes.
     */
    protected function build_atts( $atts = array() ) {
        $attribute_string = '';
        foreach ( $atts as $attr => $value ) {
            if ( false !== $value && '' !== $value && is_scalar( $value ) ) {
                $value             = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
                $attribute_string .= ' ' . $attr . '="' . $value . '"';
            }
        }
        return $attribute_string;
    }
}
type here

**error part **

        $title = apply_filters( 'nav_menu_item_title', $title, $menu_item, $args, $depth );

        $item_output  = $args->before;
        $item_output .= '<a' . $attributes . '>';
        $item_output .= $args->link_before . $title . $args->link_after;
        $item_output .= '</a>';
        $item_output .= $args->after;

        /**
         * Filters a menu item's starting output.

please help me to fix this error

I want to remove the log error, please help me to fix that

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