Unable to install Rocket.chat

Hi,

I’m on Ubuntu 18.04 and have been using Flatpak to install stuff for a while now (Libreoffice etc). Today I tried to install Rocket.Chat and got this error-

$ flatpak install flathub chat.rocket.RocketChat
Looking for matches…

chat.rocket.RocketChat permissions:
    ipc      network      pulseaudio      wayland     x11     devices     file access [1]     dbus access [2]

    [1] xdg-documents, xdg-download, xdg-pictures
    [2] org.freedesktop.Notifications, org.kde.StatusNotifierWatcher


        ID                              Branch          Op          Remote          Download
 1. [✗] chat.rocket.RocketChat          stable          i           flathub         1.0 kB / 74.9 MB

Error: Error pulling from repo: GPG verification enabled, but no signatures found (use gpg-verify=false in remote config to disable)
error: Failed to install chat.rocket.RocketChat: Error pulling from repo: GPG verification enabled, but no signatures found (use gpg-verify=false in remote config to disable)

(I tried installing few other flatpaks and that worked, seems like something specific to Rocket.Chat)

Anyone got ideas on how to fix this?

Works here (Kubuntu 20.04).

Hmm I tried again this morning and it worked. Wonder if it was a temporary issue with some server.

EDIT: Um, how do I mark this as solved?