This issue happens on version 4.0.2, installed using pacman.

Attempting to use bob install (or bob use) for of stable, latest, or nightly results in the following error:

> bob use latest 
Jan 30 02:03:20.676  INFO Fetching latest version
Jan 30 02:03:21.351 ERROR Error: Please provide an existing neovim version, Not Found

Specifying the version number directly seems to work.

The behaviour when installing bob using cargo install --git https://github.com/MordechaiHadad/bob.git is slightly different. latest and stable work, but nightly results in the same error:

> bob use latest
Jan 30 02:06:19.326  INFO Fetching latest version
Jan 30 02:06:19.601  INFO Updating neovim proxy
Downloaded version v0.10.4 to /home/fic/.local/share/bob/v0.10.4.appimage
  [00:00:00] [█████████████████████████████████████████] 11.57MiB/11.57MiB (86.70MiB/s, 0s)
Downloaded checksum v0.10.4 to /home/fic/.local/share/bob/v0.10.4.appimage.sha256sum
  [00:00:00] [██████████████████████████████████████████████████] 93B/93B (667.96KiB/s, 0s)
Jan 30 02:06:20.144  INFO Checksum matched!
Jan 30 02:06:20.413  INFO You can now use v0.10.4!

~  
> bob use nightly
Downloaded version nightly to /home/fic/.local/share/bob/nightly.appimage
  [00:00:00] [█████████████████████████████████████████] 20.52MiB/20.52MiB (95.37MiB/s, 0s)
Jan 30 02:06:23.486 ERROR Error: Please provide an existing neovim version, Not Found

~  
> vim --version
NVIM v0.10.4
Build type: Release
LuaJIT 2.1.1713484068
Run "nvim -V1 -v" for more info

Running the appimage itself works just fine:

~  
> chmod +x .local/share/bob/nightly.appimage          

~  
> .local/share/bob/nightly.appimage --version
NVIM v0.11.0-dev-1660+g35c5e23107
Build type: RelWithDebInfo
LuaJIT 2.1.1736781742
Run "nvim -V1 -v" for more info

~  
> bob update nightly
Jan 30 02:09:45.773  WARN nightly is not installed.

So, it seems like the only issue is with creating the symlink after the installation.

Kindly note that I have tried using bob erase, deleting the entire .local/share/bob directory, reinstalling bob multiple times via pacman and cargo, etc. I'm at a bit of a loss as to what may be causing this.