Fatal error: Uncaught TypeError: array_filter(): Argument #1 ($array) must be of type array, string given in /home/httpd/vhosts/time2dance.ch/httpdocs/wp-includes/class-wp-user-query.php:485
Stack trace:
#0 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-includes/class-wp-user-query.php(485): array_filter('')
#1 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-includes/class-wp-user-query.php(79): WP_User_Query->prepare_query(Array)
#2 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-includes/user.php(807): WP_User_Query->__construct(Array)
#3 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-content/plugins/wordpress-seo/inc/sitemaps/class-author-sitemap-provider.php(217): get_users(Array)
#4 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-content/plugins/wordpress-seo/inc/sitemaps/class-author-sitemap-provider.php(43): WPSEO_Author_Sitemap_Provider->update_user_meta()
#5 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-content/plugins/wordpress-seo/inc/sitemaps/class-sitemaps.php(414): WPSEO_Author_Sitemap_Provider->get_index_links(1000)
#6 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-content/plugins/wordpress-seo/inc/sitemaps/class-sitemaps.php(366): WPSEO_Sitemaps->build_root_map()
#7 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-content/plugins/wordpress-seo/inc/sitemaps/class-sitemaps.php(279): WPSEO_Sitemaps->build_sitemap('1')
#8 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-includes/class-wp-hook.php(324): WPSEO_Sitemaps->redirect(Object(WP_Query))
#9 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array)
#10 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-includes/plugin.php(565): WP_Hook->do_action(Array)
#11 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-includes/class-wp-query.php(1881): do_action_ref_array('pre_get_posts', Array)
#12 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-includes/class-wp-query.php(3852): WP_Query->get_posts()
#13 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-includes/class-wp.php(696): WP_Query->query(Array)
#14 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-includes/class-wp.php(816): WP->query_posts()
#15 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-includes/functions.php(1336): WP->main('')
#16 /home/httpd/vhosts/time2dance.ch/httpdocs/wp-blog-header.php(16): wp()
#17 /home/httpd/vhosts/time2dance.ch/httpdocs/index.php(17): require('/home/httpd/vho...')
#18 {main}
  thrown in /home/httpd/vhosts/time2dance.ch/httpdocs/wp-includes/class-wp-user-query.php on line 485