Error 404

We don't have this page in archive: https://kulcs.hvg.hu/OAuth2Client.ashx/facebook?key=aHR0cHM6Ly9rdWxjcy5odmcuaHUvZGVmYXVsdC5hc3B4P3JlZGlyZWN0X3VyaT1odHRwOi8vaHZnLmh1L09BdXRoLmFzaHgvYUhSMGNEb3ZMMmgyWnk1b2RTOTJhV3hoWnk4eU1ERXpNRGN3TVY5VGVtOXlibmxsZEdoaGJIUmZaV3h2WVdSaGMxOXJiM3BpWlc1ZllWOURhWEp4ZFdWZlpIVmZVdz09P0ZvcmNlTG9naW49VHJ1ZQ==

.

What did happend :