# Flatpak apps not installing from Discover **URL:** \ **Category:** Help\ **Tags:** neon, flatpak\ **Created:** [December 16, 2024, 8:19pm UTC](https://discuss.kde.org/t/flatpak-apps-not-installing-from-discover/27023 "2024-12-16T20:19:15Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![FredJones](https://discuss-cdn.kde.org/letter_avatar_proxy/v4/letter/f/e480ec/32.png) [@FredJones](https://discuss.kde.org/u/FredJones)\ **Post date:** [December 16, 2024, 8:19pm UTC](https://discuss.kde.org/t/flatpak-apps-not-installing-from-discover/27023/1 "2024-12-16T20:19:16Z")
All flatpak apps are failing to install with a consistent error message. Below are two example error messages: > Could not unmount revokefs-fuse filesystem at /var/tmp/flatpak-cache-NKBBZ2/org.freedesktop.Platform.GL.default-RG58Y2: Failed to execute child process “fusermount” (No such file or directory) > > Could not unmount revokefs-fuse filesystem at /var/tmp/flatpak-cache-NKBBZ2/eu.betterbird.Betterbird.Locale-09ABZ2: Failed to execute child process “fusermount” (No such file or directory) I have tried deleting the cache at ~/.cache/flatpak Thanks for your ideas… ---
**Author:** ![johnandmegh](https://discuss-cdn.kde.org/user_avatar/discuss.kde.org/johnandmegh/32/767_2.png) [@johnandmegh](https://discuss.kde.org/u/johnandmegh)\ **Post date:** [December 17, 2024, 12:43am UTC](https://discuss.kde.org/t/flatpak-apps-not-installing-from-discover/27023/2 "2024-12-17T00:43:25Z")
Hi! Going ahead and taking a guess here…this is _probably_ an issue with the packaging from the Linux distribution you’re using, or something funky with how it was installed. That error message would indicate that the executable `fusermount` isn’t present where it was expected, which might mean that installing the packages for flatpak didn’t also install [FUSE](https://wiki.archlinux.org/title/FUSE). If it’s that, manually installing your distribution’s package for FUSE might help. To help with pointing you in the right direction, can you please include in a message your system information from the Info Center application (easiest way is to click “Copy Details” highlighted below)? ![image](https://discuss-cdn.kde.org/uploads/default/original/3X/0/4/0496afdd1153ae7630762ee41714cf125e6d8fff.png) Hope that helps, ---
**Author:** ![FredJones](https://discuss-cdn.kde.org/letter_avatar_proxy/v4/letter/f/e480ec/32.png) [@FredJones](https://discuss.kde.org/u/FredJones)\ **Post date:** [December 17, 2024, 1:01am UTC](https://discuss.kde.org/t/flatpak-apps-not-installing-from-discover/27023/3 "2024-12-17T01:01:05Z")
Operating System: KDE neon 6.2 KDE Plasma Version: 6.2.4 KDE Frameworks Version: 6.9.0 Qt Version: 6.8.1 Kernel Version: 6.8.0-51-generic (64-bit) Graphics Platform: Wayland Processors: 12 × Intel® Core™ 5 120U Memory: 15.3 GiB of RAM Graphics Processor: Mesa Intel® Graphics Manufacturer: HP Product Name: HP Laptop 17-cn4xxx System Version: Type1ProductConfigId ---
**Author:** ![johnandmegh](https://discuss-cdn.kde.org/user_avatar/discuss.kde.org/johnandmegh/32/767_2.png) [@johnandmegh](https://discuss.kde.org/u/johnandmegh)\ **Post date:** [December 17, 2024, 1:26am UTC](https://discuss.kde.org/t/flatpak-apps-not-installing-from-discover/27023/4 "2024-12-17T01:26:17Z")
Thanks - and are you getting that message from within Discover? Do you have the files `/usr/bin/fusermount` and/or `/usr/bin/fusermount3` present on your system? ---
**Author:** ![FredJones](https://discuss-cdn.kde.org/letter_avatar_proxy/v4/letter/f/e480ec/32.png) [@FredJones](https://discuss.kde.org/u/FredJones)\ **Post date:** [December 17, 2024, 1:38am UTC](https://discuss.kde.org/t/flatpak-apps-not-installing-from-discover/27023/5 "2024-12-17T01:38:06Z")
Yes, Discover is giving the message. Yes, I have `/usr/bin/fusermount`, not fusermount3 ---
**Author:** ![johnandmegh](https://discuss-cdn.kde.org/user_avatar/discuss.kde.org/johnandmegh/32/767_2.png) [@johnandmegh](https://discuss.kde.org/u/johnandmegh)\ **Post date:** [December 17, 2024, 3:02am UTC](https://discuss.kde.org/t/flatpak-apps-not-installing-from-discover/27023/6 "2024-12-17T03:02:52Z")
Ah, then something was missed in a system update at some point, I believe - `/usr/bin/fusermount3` [comes from the package](https://packages.ubuntu.com/noble/amd64/fuse3/filelist) fuse3, which is a [dependency](https://packages.ubuntu.com/noble-updates/flatpak) of Ubuntu’s flatpak package. Try installing (or reinstalling) the `fuse3` package, and that should hopefully ensure that the `/usr/bin/fusermount3` binary is in place correctly. ---
**Author:** ![FredJones](https://discuss-cdn.kde.org/letter_avatar_proxy/v4/letter/f/e480ec/32.png) [@FredJones](https://discuss.kde.org/u/FredJones)\ **Post date:** [December 17, 2024, 3:21am UTC](https://discuss.kde.org/t/flatpak-apps-not-installing-from-discover/27023/7 "2024-12-17T03:21:43Z")
I actually tried that when you gave me some clues earlier…but fusermount3 doesn’t seem to install with the fuse3 install: > chris@chris-hplaptop17cn4xxx:/usr/bin$ sudo apt install fuse3 > Reading package lists… Done > Building dependency tree… Done > Reading state information… Done > fuse3 is already the newest version (3.14.0-5build1). > Starting pkgProblemResolver with broken count: 0 > Starting 2 pkgProblemResolver with broken count: 0 > Done > The following packages were automatically installed and are no longer required: > kde-inotify-survey kpim6-akonadi-notes linux-headers-6.8.0-49 linux-headers-6.8.0-49-generic > linux-image-6.8.0-49-generic linux-modules-6.8.0-49-generic linux-modules-extra-6.8.0-49-generic > linux-tools-6.8.0-49 linux-tools-6.8.0-49-generic > Use ‘sudo apt autoremove’ to remove them. > 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. > chris@chris-hplaptop17cn4xxx:/usr/bin$ ls fuser\* > fusermount ---
**Author:** ![johnandmegh](https://discuss-cdn.kde.org/user_avatar/discuss.kde.org/johnandmegh/32/767_2.png) [@johnandmegh](https://discuss.kde.org/u/johnandmegh)\ **Post date:** [December 17, 2024, 3:38am UTC](https://discuss.kde.org/t/flatpak-apps-not-installing-from-discover/27023/8 "2024-12-17T03:38:38Z")
If APT believes that a package is already installed, it won’t rewrite the files associated with it by default. To force that, you could use `sudo apt-get install --reinstall fuse3`. ---
**Author:** ![FredJones](https://discuss-cdn.kde.org/letter_avatar_proxy/v4/letter/f/e480ec/32.png) [@FredJones](https://discuss.kde.org/u/FredJones)\ **Post date:** [December 17, 2024, 4:08am UTC](https://discuss.kde.org/t/flatpak-apps-not-installing-from-discover/27023/9 "2024-12-17T04:08:46Z")
This was the solution, thank you very much! It brought fusermount3 into /usr/bin. I can now install flatpak apps! > sudo apt install fuse3 --reinstall