co-authors plugin – inline listing

solved using for loop instead of foreach:

function inl_users() {
if ( function_exists( 'get_coauthors' ) ) {
  $coauthors = get_coauthors();
  for ($i = 0; $i < count($coauthors); $i++){
      $autArray[] = '<a href="https://wordpress.stackexchange.com/questions/404167/. get_author_posts_url( $coauthors[$i]->ID ) .">' . $coauthors[$i]->display_name . '</a>';
  }
  echo implode(", ", $autArray);
}

does anoyone know why?