The repo states that updates are available but the download fails:

[MIRROR] erlang-25.1.2-1.63.el9.kolab_16.x86_64.rpm: Status code: 404 for https://mirror.apheleia-it.ch/repos/Kolab:/16/EL_9/x86_64/erlang-25.1.2-1.63.el9.kolab_16.x86_64.rpm (IP:
212.103.80.162)

Only 25.1.2-1.62 is available.