Fatal error attempting to update menus

Using latest theme (3.4.1). In the WP Admin screen, if I select Appearance, Menus, I get the error below. Looking for next steps to resolve this issue.

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Fatal error: Uncaught ArgumentCountError: Too few arguments to function HB_Custom_Walker_Admin::hb_edit_walker(), 1 passed in /app/public/wp-includes/class-wp-hook.php on line 286 and exactly 2 expected in /app/public/wp-content/themes/HighendWP/hbframework/menu-walker/class-hb-custom-walker-edit.php:117 Stack trace: #0 /app/public/wp-includes/class-wp-hook.php(286): HB_Custom_Walker_Admin->hb_edit_walker(‘Walker_Nav_Menu…’) #1 /app/public/wp-includes/plugin.php(203): WP_Hook->apply_filters(‘Walker_Nav_Menu…’, Array) #2 /app/public/wp-content/plugins/if-menu/if-menu.php(136): apply_filters(‘wp_edit_nav_men…’, ‘Walker_Nav_Menu…’) #3 /app/public/wp-includes/class-wp-hook.php(286): If_Menu::admin_init(‘nav-menus.php’) #4 /app/public/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #5 /app/public/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #6 /app/public/wp-admin/admin-header.php(97): do_action(‘admin_enqueue_s…’, ‘nav-menus.php’) #7 /app/public/wp-admin/nav-menus.php(576): require_ in /app/public/wp-content/themes/HighendWP/hbframework/menu-walker/class-hb-custom-walker-edit.php on line 117