Doesn't run on Linux using flatpak

[shiznix]

~ $ flatpak install butter-desktop_x86_64.flatpak
Installing in system:
org.butterproject.Desktop/x86_64/master org.butterproject.Desktop-3-origin c87dd44a15c3
permissions: ipc, network, pulseaudio, x11, dri
file access: home
Is this ok [y/n]: y
Installing: org.butterproject.Desktop/x86_64/master from bundle butter-desktop_x86_64.flatpak
Now at c87dd44a15c3.

~ $ flatpak info org.butterproject.Desktop
Ref: app/org.butterproject.Desktop/x86_64/master
ID: org.butterproject.Desktop
Arch: x86_64
Branch: master
Origin: org.butterproject.Desktop-3-origin
Date: 2017-06-18 02:04:46 +0000
Subject: Export org.butterproject.Desktop
Commit: c87dd44a15c328d66810069c5c05530ae07b213ad62599ae083140f05663adb7
Parent: -
Location: /var/lib/flatpak/app/org.butterproject.Desktop/x86_64/master/c87dd44a15c328d66810069c5c05530ae07b213ad62599ae083140f05663adb7
Installed size: 301.3 MB
Runtime: org.freedesktop.Platform/x86_64/1.4
Sdk: org.freedesktop.Sdk/x86_64/1.4

~ $ flatpak run org.butterproject.Desktop
Missing filename ("less --help" for help)