Kube installation failed

[Sytse Knypstra]

Dear list members,

Today I wanted to try out Kube on my Peppermint OS Linux box. I 
executed the first instruction on  https://kube-project.com/getit.html
 but it failed. This is what happened:

> sytse at ZBOX ~ $ flatpak -y --user install --from 
> https://files.kube-project.com/flatpak/com.kubeproject.kube.flatpakref
> Installing in user:
> com.kubeproject.kube/x86_64/master com.kubeproject.kube-origin 
> d321a7174525
>   permissions: ipc, network, wayland, x11, dri
>   file access: /tmp, host
>   dbus access: org.freedesktop.secrets
>   dbus ownership: com.kubeproject.kube
>   tags: nightly
> Installing for user: com.kubeproject.kube/x86_64/master from 
> com.kubeproject.kube-origin
> [####################] Downloading files: 3059/3060 113,0 MB (830,6 
> kB/s)
> error: Failed to install com.kubeproject.kube/x86_64/master: While 
> pulling app/com.kubeproject.kube/x86_64/master from remote 
> com.kubeproject.kube-origin: Error receiving data: Connection reset 
> by peer
> sytse at ZBOX ~ $

What could be the cause of the error?

greetings,

Sytse Knypstra
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