The link provide by you doesn’t work
https://dl.packager.io/srv/zammad/zammad/stable/installer/ubuntu/20.04.repo
The repository doesn’t exists.
The link provide by you doesn’t work
https://dl.packager.io/srv/zammad/zammad/stable/installer/ubuntu/20.04.repo
The repository doesn’t exists.
Looks like that was a temporary issue on packager.io site.
We have no control over these situations. Right now the repository is working - except for your post I didn’t notice any drawbacks.