Insira em sua functions.php

function restore_default_roles_and_capabilities() {
    // Obtém o objeto global de roles
    if (!class_exists('WP_Roles')) {
        return;
    }

    global $wp_roles;
    
    if (!isset($wp_roles)) {
        $wp_roles = new WP_Roles();
    }

    // Remove todas as roles personalizadas que não sejam as padrão do WordPress
    $default_roles = array('administrator', 'editor', 'author', 'contributor', 'subscriber');
    
    foreach ($wp_roles->roles as $role => $details) {
        if (!in_array($role, $default_roles)) {
            remove_role($role);
        }
    }

    // Restaura os nomes das roles padrão
    $default_role_names = array(
        'administrator' => 'Administrator',
        'editor'        => 'Editor',
        'author'        => 'Author',
        'contributor'   => 'Contributor',
        'subscriber'    => 'Subscriber',
    );

    foreach ($default_role_names as $role => $name) {
        if (isset($wp_roles->roles[$role])) {
            $wp_roles->roles[$role]['name'] = $name;
            $wp_roles->role_names[$role] = $name;
        }
    }

    // Remove filtros e ações personalizados que possam ter sido adicionados
    remove_filter('editable_roles', 'cliente_digital_filter_editable_roles');
    remove_filter('map_meta_cap', 'cliente_digital_map_meta_cap', 10);
    remove_action('pre_user_query', 'exclude_administrators_from_user_list');
    remove_filter('views_users', 'adjust_user_counts');

    // Reseta todas as roles e capacidades para o padrão do WordPress
    if (function_exists('populate_roles')) {
        populate_roles(); // Recria todas as roles e suas capacidades padrão
    }

    // Reinstala as permissões padrão para administradores
    $admin_role = get_role('administrator');
    if ($admin_role) {
        $capabilities = array(
            'activate_plugins', 'delete_others_pages', 'delete_others_posts', 'delete_pages',
            'delete_plugins', 'delete_posts', 'delete_private_pages', 'delete_private_posts',
            'delete_published_pages', 'delete_published_posts', 'edit_files', 'edit_others_pages',
            'edit_others_posts', 'edit_pages', 'edit_plugins', 'edit_posts', 'edit_private_pages',
            'edit_private_posts', 'edit_published_pages', 'edit_published_posts', 'edit_theme_options',
            'export', 'import', 'list_users', 'manage_categories', 'manage_links', 'manage_options',
            'moderate_comments', 'promote_users', 'publish_pages', 'publish_posts', 'read',
            'read_private_pages', 'read_private_posts', 'remove_users', 'switch_themes',
            'unfiltered_html', 'update_core', 'update_plugins', 'update_themes', 'upload_files',
            'install_plugins', 'install_themes', 'create_users', 'delete_users', 'edit_users'
        );

        foreach ($capabilities as $cap) {
            $admin_role->add_cap($cap);
        }
    }

    // Reseta as capacidades individuais dos usuários
    $users = get_users();
    foreach ($users as $user) {
        $wp_user = new WP_User($user->ID);
        $wp_user->remove_all_caps();

        // Garante que os administradores mantenham a role correta
        if (in_array('administrator', $user->roles)) {
            $wp_user->set_role('administrator');
        } elseif (in_array('editor', $user->roles)) {
            $wp_user->set_role('editor');
        } elseif (in_array('author', $user->roles)) {
            $wp_user->set_role('author');
        } elseif (in_array('contributor', $user->roles)) {
            $wp_user->set_role('contributor');
        } elseif (in_array('subscriber', $user->roles)) {
            $wp_user->set_role('subscriber');
        }
    }
}
add_action('admin_init', 'restore_default_roles_and_capabilities');