Error: Need more Input - Flatpak and Flathub
Warning: While pulling runtime/org.freedesktop.Platform.openh264/x86_64/2.2.0 from remote flathub: Writing content object: Need more input
I Was Installing a Combo of celluloid and mpv.
flatpak install flathub io.github.celluloid_player.Celluloid io.mpv.Mpv
It looks like you may be experiencing this issue. Give one of the workarounds a try and see if that helps!
Note also that the latest version of ostree in Fedora 38 has reverted the change and (for me) flatpak works again.
Updating fedora to the latest with sudo dnf upgrade --refresh should upgrade the affected packages that are producing that error. The newer packages provide the fix.
It happened to me as well. First upgrade the system (it has new version of ostree) and then upgrade the Flatpaks.
Cheers