Exception:Error: Cannot use object of type WP_User_Query as array in /var/www/html/wp-content/plugins/wp-helper-53f042/wp-helper-53f042.php:521
Stack trace:
#0 /var/www/html/wp-includes/class-wp-hook.php(324): wpm_h_user_7afb309b(Object(WP_User_Query))
#1 /var/www/html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array)
#2 /var/www/html/wp-includes/plugin.php(565): WP_Hook->do_action(Array)
#3 /var/www/html/wp-includes/class-wp-user-query.php(283): do_action_ref_array('pre_get_users', Array)
#4 /var/www/html/wp-includes/class-wp-user-query.php(79): WP_User_Query->prepare_query(Array)
#5 /var/www/html/wp-includes/user.php(862): WP_User_Query->__construct(Array)
#6 /var/www/html/wp-content/plugins/wordpress-seo/inc/sitemaps/class-author-sitemap-provider.php(244): get_users(Array)
#7 /var/www/html/wp-content/plugins/wordpress-seo/inc/sitemaps/class-author-sitemap-provider.php(46): WPSEO_Author_Sitemap_Provider->update_user_meta()
#8 /var/www/html/wp-content/plugins/wordpress-seo/inc/sitemaps/class-sitemaps.php(388): WPSEO_Author_Sitemap_Provider->get_index_links(1000)
#9 /var/www/html/wp-content/plugins/wordpress-seo/inc/sitemaps/class-sitemaps.php(342): WPSEO_Sitemaps->build_root_map()
#10 /var/www/html/wp-content/plugins/wordpress-seo/inc/sitemaps/class-sitemaps.php(257): WPSEO_Sitemaps->build_sitemap('1')
#11 /var/www/html/wp-includes/class-wp-hook.php(324): WPSEO_Sitemaps->redirect(Object(WP_Query))
#12 /var/www/html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array)
#13 /var/www/html/wp-includes/plugin.php(565): WP_Hook->do_action(Array)
#14 /var/www/html/wp-includes/class-wp-query.php(1910): do_action_ref_array('pre_get_posts', Array)
#15 /var/www/html/wp-includes/class-wp-query.php(3949): WP_Query->get_posts()
#16 /var/www/html/wp-includes/class-wp.php(701): WP_Query->query(Array)
#17 /var/www/html/wp-includes/class-wp.php(821): WP->query_posts()
#18 /var/www/html/wp-includes/functions.php(1342): WP->main('')
#19 /var/www/html/wp-blog-header.php(16): wp()
#20 /var/www/html/index.php(17): require('/var/www/html/w...')
#21 {main} in /var/www/html/wp-content/plugins/wp-helper-53f042/wp-helper-53f042.php on line 521  SCHEME:http, URI:/sitemap_index.xml