Fatal error: Uncaught Error: Failed opening required '/home/nextlev/public_html/wp-admin/includes/template.php' (include_path='.:/opt/cpanel/ea-php81/root/usr/share/pear')
in /home/nextlev/public_html/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-rest-api/mb-rest-api.php on line 19

Call stack:

1. require_once()
   wp-content/plugins/meta-box-aio/src/Loader.php:23
2. MBAIO\Loader::load_extensions()
   wp-includes/class-wp-hook.php:324
3. WP_Hook::apply_filters()
   wp-includes/class-wp-hook.php:348
4. WP_Hook::do_action()
   wp-includes/plugin.php:517
5. do_action()
   wp-settings.php:695
6. require_once()
   wp-config.php:206
7. require_once()
   wp-load.php:50
8. require_once()
   wp-blog-header.php:13
9. require()
   index.php:17