Comment 2 for bug 2047964

I reproduced the bug using the same install configuration. This is the error message.

```
Command <i>calamares_snap_install /tmp/calamares-root-d790tyxg element-desktop=stable</i> finished with exit code 1.
Output:
Fetching snap "element-desktop"
Fetching assertions for "element-desktop"
Install the snap with:
   snap ack ../../tmp/calamares-root-d790tyxg/var/lib/snapd/seed/snaps/element-desktop_74.assert
   snap install ../../tmp/calamares-root-d790tyxg/var/lib/snapd/seed/snaps/element-desktop_74.snap
error: cannot validate seed:
 - cannot read assertions dir: readdirent /tmp/calamares-root-d790tyxg/var/lib/snapd/seed/assertions: not a directory
```

maybe this bug should be filed against element?