Curl errors during package/apt update

Hello,
every time I run a package update from the gui or apt I get this curl errors:

[...]
Setting up univention-management-console-web-server (14.2.1) ...
Installing new version of config file /etc/univention/templates/modules/configure_umc_multiprocessing.py ...
Installing new version of config file /etc/univention/templates/modules/setup_saml_sp.py ...
Module: setup_oidc_rp
umc/oidc/issuer not set, nothing to do
File: /etc/apache2/sites-available/univention.conf
File: /etc/apache2/sso-vhost.conf.d/01redirect.conf
Module: configure_umc_multiprocessing
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
^M  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0^M  0    58    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
curl: (22) The requested URL returned error: 404
Try to download idp metadata (2/60)
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
^M  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0^M  0    58    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
curl: (22) The requested URL returned error: 404
Try to download idp metadata (3/60)
[...]
curl: (22) The requested URL returned error: 404
E: your request could not be fulfilled
try `univention-config-registry --help` for more information
Module wsgi already enabled
Module proxy already enabled
Considering dependency proxy for proxy_connect:
Module proxy already enabled
[...]

The update finishes without further errors and the ucs instance seems to be ok.

…too bad it does not tell which URL it actually tries to fetch