Unable to install on clear installed Ubuntu 25.10

[vitaliiorlov]

Hello,

during the installation Omakub on just installed Ubuntu 25.10, I have got the following error: Error: Package 'tldr' has no installation candidate.
This also isn't worked.

sudo apt update
sudo apt install tldr

So, I have installed tldr via pipx manually. But it also did not help.

[Rnedlose]

You can go into the install files and remove tldr from the install list for now, and install it in another fashion if you want it still.

Note that the install will fail later trying to install obsidian as well, currently 25.10 has a major bug related to flatpak installations, and that is the other point where it will fail.

[MostlyKIGuess]

Note that the install will fail later trying to install obsidian as well, currently 25.10 has a major bug related to flatpak installations, and that is the other point where it will fail.

reparar flatpak ubuntu 25.10
Edit /etc/apparmor.d/fusermount3 in your favourite text editor, via sudo
Add at line 11 (which should be empty) add: /run/mount/utab.lock rwk,
Save & exit
Reload the fusermount3 rules: sudo apparmor_parser -r /etc/apparmor.d/fusermount3
Try again.

[Kasui92]

A good solution I found was to rely on pipx for installation, which is a library already used to install other packages. Removing it from the apt installation solved the problem.