Memtest are failing due to packages that can't be installed

Hi.

I tried to run a memtest on our maas instance and I’m getting the following error log:
```
Reading package lists…
Building dependency tree…
Reading state information…
Package memtester is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'memtester' has no installation candidate
```

Are any preconditions that need to be configured to make memtest work?

Cheers,
Luis

@mompo, can you tell me a bit more about your configuration? for example, see here for the kind of details i’m looking for.

The memtester packer comes from universe. You need to make sure MAAS is configured to allow access to universe.

@billwear Not sure if this needs a full bug report. This is a snap based MAAS setup. I triggered memtest over the webui and got this error log.
@ltrager by default the universe repo is enabled in the MAAS settings. Can this be related to snap installation of MAAS?

If you are using a mirror make sure the mirror includes universe. Its possible that universe is enabled but the mirror doesn’t have anything.

I would also try again. Its possible that the apt-get update command failed to fetch universe meta-data.