JUJU repo URL doesn't exist

I am trying to install OSM on a single node.
I have tried in two different ways:

- through the OSM installation documentation. (https://osm.etsi.org/docs/user-guide/03-installing-osm.html#installation-from-source)
- through JUJU following this tutorial. (https://jaas.ai/osm/bundle)

Both fail to attempt to install the JUJU driver in an LXD container. The error log of the "cloud-init-output.log" file specifies the following:

Attempt 1 to download agent binaries from https://streams.canonical.com/juju/tools/agent/2.7.1/juju-2.7.1-ubuntu-amd64.tgz...
curl: (22) The requested URL returned error: 404 Not Found
agent binaries from https://streams.canonical.com/juju/tools/agent/2.7.1/juju-2.7.1-ubuntu-amd64.tgz downloaded: HTTP 404; time 0.141986s; size 0 bytes; speed 0.000 bytes/s Download failed, retrying in 15s
Attempt 2 to download agent binaries from https://streams.canonical.com/juju/tools/agent/2.7.1/juju-2.7.1-ubuntu-amd64.tgz...
curl: (22) The requested URL returned error: 404 Not Found
agent binaries from https://streams.canonical.com/juju/tools/agent/2.7.1/juju-2.7.1-ubuntu-amd64.tgz downloaded: HTTP 404; time 0.133174s; size 0 bytes; speed 0.000 bytes/s Download failed, retrying in 15s

In fact, the link does not work. There is no such URL, but other repositories.
I do not know how I can report this error to fix it. Maybe from here someone can fix it