Error retrieving addressbook from nextcloud (not generally)

[kevinkk525]

 Client error: `GET https://<nextcloud>/remote.php/dav/addressbooks/users/<user>/Handy/69bb835b-b62a-4b4f-875d-a80e1e56b232vcf.vcf` resulted in a `404 Not Found` response:
  <?xml version="1.0" encoding="utf-8"?>
  <d:error xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns">
    <s:exception>Sabre\DA (truncated...)

I'm using nextcloud 13 and php5 to run your script.

Do you have any idea what's causing this problem or how it can be fixed? It occurs on by addressbook that I use since years. Another adressbook that I created recently works without a problem.

Thanks for your work on this script, makes my life easier :D