Kubuntu 25.10 Alpha - VirtualBox - Unable To Install Flatpaks In Discover - Error Included

[savantsavior]

Hi,

Been playing with Kubuntu 25.10 Alpha in Virtualbox.

When trying to install flatpaks in Discover, I get the following error:

Could not unmount revokefs-fuse filesystem at /var/tmp/flatpak-cache-T17PC3/org.freedesktop.Platform.GL.default-NZ7PC3: Child process exited with code 1

Any ideas?
Thanks!

SS

[oshunluvr]

AI output: Sounds like a user permission problem.