CollEc is down at this time.

The middleware used by CollEc is not compatible with the release of docker installed on 24 January 2024.
docker-compose-plugin:amd64 (2.21.0-1~ubuntu.22.04~jammy, 2.24.1-1~ubuntu.22.04~jammy)
docker-ce-cli:amd64 (5:24.0.7-1~ubuntu.22.04~jammy, 5:25.0.0-1~ubuntu.22.04~jammy),
docker-ce:amd64 (5:24.0.7-1~ubuntu.22.04~jammy, 5:25.0.0-1~ubuntu.22.04~jammy)
docker-ce-rootless-extras:amd64 (5:24.0.7-1~ubuntu.22.04~jammy, 5:25.0.0-1~ubuntu.22.04~jammy)
I, Thomas Krichel have not found a way to downgrade this ubuntu packages. The maintainer for CollEc, Christian Düben, hopes that it will be fixed in the next few days.
Help is welcome!