Breadcrumbs error in author archive page

Hi.

Error:

PHP Notice: Trying to get property ‘ID’ of non-object in /var/www/html/wp-content/plugins/seo-by-rank-math/includes/frontend/class-breadcrumbs.php on line 442

Your function should not make use of global $author:

private function add_crumbs_author() {
		global $author;

		$userdata = get_userdata( $author );
		$this->add_crumb( sprintf( $this->strings['archive_format'], $this->get_breadcrumb_title( 'user', $userdata->ID, $userdata->display_name ) ) );
	}

Instead make use of something related to the main query:

private function add_crumbs_author() {
		$userdata = get_userdata( get_query_var('author') );
		$this->add_crumb( sprintf( $this->strings['archive_format'], $this->get_breadcrumb_title( 'user', $userdata->ID, $userdata->display_name ) ) );
	}