Upgrade of ecne fails

Here is what happens:

$ sudo apt update
Get:1 https://dl.jami.net/stable/ubuntu_24.04 jami InRelease [3596 B]
Get:2 https://dl.jami.net/stable/ubuntu_24.04 jami/main amd64 Packages [3092 B]                                 
0% [Waiting for headers] [Waiting for headers] [Connected to archive.trisquel.org (18.4.89.22)]terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::substr: __pos (which is 64) > this->size() (which is 63)
Abandon
$

$ cat /etc/apt/sources.list
# Trisquel repositories for supported software and updates

deb https://ftp.acc.umu.se/mirror/trisquel/packages/ ecne main
deb-src https://ftp.acc.umu.se/mirror/trisquel/packages/ ecne main
# deb https://archive.trisquel.org/trisquel/ ecne-security main
deb-src https://ftp.acc.umu.se/mirror/trisquel/packages/ ecne-security main
deb https://ftp.acc.umu.se/mirror/trisquel/packages/ ecne-updates main
deb-src https://ftp.acc.umu.se/mirror/trisquel/packages/ ecne-updates main
deb https://ftp.acc.umu.se/mirror/trisquel/packages/ ecne-backports main
deb-src https://ftp.acc.umu.se/mirror/trisquel/packages/ ecne-backports main

# Testing repository
# deb http://builds.trisquel.org/repos-testing/ecne ecne main

# This system was installed using small removable media
# (e.g. netinst, live or single CD). The matching "deb cdrom"
# entries were disabled at the end of the installation process.
# For information about how to configure apt package sources,
# see the sources.list(5) manual.
deb https://archive.trisquel.org/trisquel/ ecne-security main
$

I tried changing mirror, it makes no difference. Also, I tried rebooting, no difference.

I have no idea what to do.