Why does the VKontakte authorization API not work?

Question

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I do everything according to the instructions https://vk.com/dev/auth_sites
I get an error

{"error":"invalid_request","error_description":"redirect_uri has wrong domain, check application settings"}

<?php 

$link = '<a href="https://oauth.vk.com/authorize?client_id=5580872&display=page&redirect_uri=http://oauth/callback&scope=friends&response_type=code&v=5.92">тык</a>';
  
  if(!empty($_GET['code'])) {
  echo '<pre>';
    print_r($_GET['code']);
  echo '</pre>';
  
  echo '<a href="https://oauth.vk.com/access_token?client_id=5580872&client_secret=7FZtz377OtcKydMd7IoL&redirect_uri=http://oauth&code='. $_GET['code'] .'">тык</a>';
  
  
  }
  
  echo $link;