Updateing haling as it tries to connect to ucs-sso.testsystem.intranet port 443

When i try to update my univention server (singe-server-setup) i get this error after a while

File: /etc/apache2/sso-vhost.conf.d/01redirect.conf
Module: setup_saml_sp
Try to download idp metadata (1/60)
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:--  0:02:09 --:--:--     0
curl: (28) Failed to connect to ucs-sso.testsystem.intranet port 443 after 129918 ms: Couldn't connect to server
Try to download idp metadata (2/60)
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:--  0:02:10 --:--:--     0
curl: (28) Failed to connect to ucs-sso.testsystem.intranet port 443 after 130057 ms: Couldn't connect to server

this repeats for a long time.
Any ide how to fix it?
i have a dns recor pointing to it with url like univention.<mydomain…net> setup with a letsencypt cert (handled by the letsencrypt plugin)