Fatal error: Uncaught Error: Class 'RankMath\Helpers\Str' not found
in /home/enbursa/public_html/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/class-router.php on line 91

Call stack:

1. RankMath\Sitemap\Router::reduce_query_load()
   wp-includes/class-wp-hook.php:324
2. WP_Hook::apply_filters()
   wp-includes/class-wp-hook.php:348
3. WP_Hook::do_action()
   wp-includes/plugin.php:517
4. do_action()
   wp-settings.php:621
5. require_once()
   wp-config.php:102
6. require_once()
   wp-load.php:50
7. require()
   wp-login.php:12