Error updating Socket I/O timed out

[swingcake]

Ubuntu 18.04 LTS
Flatpak 0.11.7

Running the command flatpak update returns

Looking for updates...
Required runtime for org.videolan.VLC/x86_64/stable (org.kde.Platform/x86_64/5.11) is not installed, searching...
Found in remote flathub, do you want to install it? [y/n]: y
Installing: org.kde.Platform/x86_64/5.11 from flathub
[#####               ] Downloading: 42.8 MB/242.2 MB (807.4 kB/s)  
Error: Failed to install org.kde.Platform/x86_64/5.11: While pulling runtime/org.kde.Platform/x86_64/5.11 from remote flathub: Socket I/O timed out
Skipping org.kde.Platform.Locale/x86_64/5.11 due to previous error
Skipping org.videolan.VLC/x86_64/stable due to previous error

ostree isn't installed.
Download does not resume and starts afresh.

After installing it with apt, ostree --version returns

libostree:
 Version: 2018.4
 Features:
  - libsoup
  - gpgme
  - libarchive
  - selinux
  - libmount
  - release

After installing ostree, the download returns the same error but resumes from where it aborted.

gawd@tushbox:~$ flatpak update
Looking for updates...
Required runtime for org.videolan.VLC/x86_64/stable (org.kde.Platform/x86_64/5.11) is not installed, searching...
Found in remote flathub, do you want to install it? [y/n]: y
Installing: org.kde.Platform/x86_64/5.11 from flathub
[#####               ] Downloading: 38.9 MB/208.0 MB (681.8 kB/s)  
Error: Failed to install org.kde.Platform/x86_64/5.11: While pulling runtime/org.kde.Platform/x86_64/5.11 from remote flathub: Socket I/O timed out
Skipping org.kde.Platform.Locale/x86_64/5.11 due to previous error
Skipping org.videolan.VLC/x86_64/stable due to previous error
error: One or more operations failed
gawd@tushbox:~$ flatpak update
Looking for updates...
Required runtime for org.videolan.VLC/x86_64/stable (org.kde.Platform/x86_64/5.11) is not installed, searching...
Found in remote flathub, do you want to install it? [y/n]: y
Installing: org.kde.Platform/x86_64/5.11 from flathub
[######              ] Downloading: 43.5 MB/180.0 MB (750.7 kB/s)
Error: Failed to install org.kde.Platform/x86_64/5.11: While pulling runtime/org.kde.Platform/x86_64/5.11 from remote flathub: Socket I/O timed out
Skipping org.kde.Platform.Locale/x86_64/5.11 due to previous error
Skipping org.videolan.VLC/x86_64/stable due to previous error
error: One or more operations failed
gawd@tushbox:~$ flatpak update
Looking for updates...
Required runtime for org.videolan.VLC/x86_64/stable (org.kde.Platform/x86_64/5.11) is not installed, searching...
Found in remote flathub, do you want to install it? [y/n]: y
Installing: org.kde.Platform/x86_64/5.11 from flathub
[#####               ] Downloading: 25.4 MB/144.9 MB (488.0 kB/s)              
Error: Failed to install org.kde.Platform/x86_64/5.11: While pulling runtime/org.kde.Platform/x86_64/5.11 from remote flathub: Socket I/O timed out
Skipping org.kde.Platform.Locale/x86_64/5.11 due to previous error
Skipping org.videolan.VLC/x86_64/stable due to previous error
error: One or more operations failed

[swingcake]

gawd@tushbox:~$ flatpak update
Looking for updates...
Required runtime for org.videolan.VLC/x86_64/stable (runtime/org.kde.Platform/x86_64/5.11) found in remote flathub
Do you want to install it? [y/n]: y
Updating: org.freedesktop.Sdk/x86_64/1.6 from flathub
[####################] 1 delta parts, 1 loose fetched; 102 KiB transferred in 2 seconds
Now at 5574941f21c2.
Updating: io.atom.Atom/x86_64/stable from flathub
[#####               ] Downloading: 15.6 MB/89.0 MB (741.0 kB/s)               
Error: Failed to update io.atom.Atom/x86_64/stable: While pulling app/io.atom.Atom/x86_64/stable from remote flathub: Socket I/O timed out
Installing: org.kde.Platform/x86_64/5.11 from flathub
[####                ] Downloading: 32.1 MB/235.1 MB (553.5 kB/s)              
Error: Failed to install org.kde.Platform/x86_64/5.11: While pulling runtime/org.kde.Platform/x86_64/5.11 from remote flathub: Socket I/O timed out

Skipping org.kde.Platform.Locale/x86_64/5.11 due to previous error
Skipping org.videolan.VLC/x86_64/stable due to previous errorUpdating: org.freedesktop.Platform/x86_64/1.6 from flathub
[####################] 1 delta parts, 1 loose fetched; 71 KiB transferred in 3 seconds
Now at 0d47f92d2f31.
error: There were one or more errors

[mwleeds]

FWIW there's been some recent work in ostree to work around these types of errors: ostreedev/ostree#1594.

Also, flatpak has a hard dependency on libostree so you must have had that installed the whole time. But perhaps the ostree command line tools are packaged separately on Ubuntu.

[swingcake]

Fixed itself.