Cannot download backup file - No mapping for GET /internalapi/getbackupfile

[0x0054]

• What do you expect to happen?
  Be able to download backup files
• What does happen?
  An error is show (see below for log entry)
• Have you searched for this problem? You don't have to answer, just make sure.
  Yes
• Can the problem be reproduced? How?
  On the current version try to download a backup file
• If you use a docker container please tell me which one.
  v4.3.1-ls52

Error log:
2022-05-05 07:46:29.328 WARN --- [http-nio-0.0.0.0-5] o.s.web.servlet.PageNotFound : [Host: 192.168.0.4] No mapping for GET /internalapi/getbackupfile

Seems this was broken a couple of updates ago, not sure when exactly but maybe this has something to do with the API docs that were released recently?