I got a similar issue with Flatpak 1.16.0 on Kali Linux (Debian derivative).
ID Branch Op Remote Download 1. [\] org.freedesktop.Platform.openh264 2.5.1 i flathub 620.4 kB / 971.4 kB ID Branch Op Remote Download 1. [✗] org.freedesktop.Platform.openh264 2.5.1 i flathub 620.4 kB / 971.4 kB ID Branch Op Remote Download 1. [✗] org.freedesktop.Platform.openh264 2.5.1 i flathub 620.4 kB / 971.4 kB ID Branch Op Remote Download 1. [✗] org.freedesktop.Platform.openh264 2.5.1 i flathub 620.4 kB / 971.4 kB 2. [✗] org.freedesktop.Platform.openh264 2.5.1beta i gnome-nightly 620.1 kB / 971.2 kB 1. [✗] org.freedesktop.Platform.openh264 2.5.1 i flathub 620.4 kB / 971.4 kB 2. [✗] org.freedesktop.Platform.openh264 2.5.1beta i gnome-nightly 620.1 kB / 971.2 kB 14. [✗] com.slack.Slack stable u flathub 129.6 MB / 133.2 MB Warning: While trying to apply extra data: apply_extra script failed, exit status 256 Warning: While trying to apply extra data: apply_extra script failed, exit status 256 Error: While trying to apply extra data: apply_extra script failed, exit status 256 Changes complete. error: There were one or more errors -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2061728 Title: Flatpak Apps don't launch from GNOME Software To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/2061728/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs