CHADtree "Failed to start server: no such file or directory" Error on opening vim

[colonel-panic-at-the-disco]

I have run :CHADdeps.

Error detected while processing ~/.local/share/nvim/plugged/chadtree/plugin/chadtree.vim:
line   20:
E5108: Error executing lua .../.local/share/nvim/plugged/chadtree/lua/chadtree.lua:144: Vim:Failed to
start server: no such file or directory
stack traceback:
        [C]: in function 'nvim_call_function'
        ...tman/.local/share/nvim/plugged/chadtree/lua/chadtree.lua:144: in function 'Noop'
        ...tman/.local/share/nvim/plugged/chadtree/lua/chadtree.lua:207: in main chunk
        [C]: in function 'require'
        [string "luaeval()"]:1: in main chunk

Neovim healthcheck comes back clean:

===========================================
coc: health#coc#check

- OK nvim version satisfied
- OK Environment check passed
- OK Javascript bundle build/index.js found
- OK Service started

==============================================================================
nvim: require("nvim.health").check()

Configuration ~
- OK no issues found

Runtime ~
- OK $VIMRUNTIME: /usr/local/Cellar/neovim/0.9.1/share/nvim/runtime

Performance ~
- OK Build type: Release

Remote Plugins ~
- OK Up to date

terminal ~
- key_backspace (kbs) terminfo entry: `key_backspace=^H`
- key_dc (kdch1) terminfo entry: `key_dc=\E[3~`
- $TERM_PROGRAM="iTerm.app"
- $COLORTERM="truecolor"

==============================================================================
nvim-treesitter: require("nvim-treesitter.health").check()

Installation ~
- OK `tree-sitter` found 0.20.8 (parser generator, only needed for :TSInstallFromGrammar)
- OK `node` found v20.3.0 (only needed for :TSInstallFromGrammar)
- OK `git` executable found.
- OK `gcc` executable found. Selected from { "gcc" }
  Version: Apple clang version 14.0.3 (clang-1403.0.22.14.1)
- OK Neovim was compiled with tree-sitter runtime ABI version 14 (required >=13). Parsers must be compatible with runtime ABI.

OS Info:
{
  machine = "x86_64",
  release = "22.5.0",
  sysname = "Darwin",
  version = "Darwin Kernel Version 22.5.0: Mon Apr 24 20:53:19 PDT 2023; root:xnu-8796.121.2~5/RELEASE_ARM64_T6020"
} ~

Parser/Features         H L F I J
  - bash                ✓ ✓ ✓ . ✓
  - c                   ✓ ✓ ✓ ✓ ✓
  - javascript          ✓ ✓ ✓ ✓ ✓
  - lua                 ✓ ✓ ✓ ✓ ✓
  - ninja               ✓ . ✓ ✓ .
  - python              ✓ ✓ ✓ ✓ ✓
  - query               ✓ ✓ ✓ ✓ ✓
  - ruby                ✓ ✓ ✓ ✓ ✓
  - rust                ✓ ✓ ✓ ✓ ✓
  - swift               ✓ ✓ . ✓ .
  - typescript          ✓ ✓ ✓ ✓ ✓
  - vim                 ✓ ✓ ✓ . ✓
  - vimdoc              ✓ . . . ✓

  Legend: H[ighlight], L[ocals], F[olds], I[ndents], In[j]ections
         +) multiple parsers found, only one will be used
         x) errors found in the query, try to run :TSUpdate {lang} ~

==============================================================================
provider: health#provider#check

Clipboard (optional) ~
- OK Clipboard tool found: pbcopy

Python 3 provider (optional) ~
- pyenv: Path: /usr/local/Cellar/pyenv/2.3.20/libexec/pyenv
- pyenv: Root: /usr/local/var/pyenv
- Using: g:python3_host_prog = "/usr/local/bin/python3"
- Executable: /usr/local/bin/python3
- Python version: 3.11.4
- pynvim version: 0.4.3
- OK Latest pynvim is installed.

Python virtualenv ~
- OK no $VIRTUAL_ENV

Ruby provider (optional) ~
- Ruby: ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-darwin18]
- Host: ~/.rvm/gems/ruby-2.5.1/bin/neovim-ruby-host
- OK Latest "neovim" gem is installed: 0.9.0

Node.js provider (optional) ~
- Node.js: v20.3.0
- Nvim node.js host: /usr/local/lib/node_modules/neovim/bin/cli.js
- OK Latest "neovim" npm/yarn/pnpm package is installed: 4.10.1

Perl provider (optional) ~
- WARNING "Neovim::Ext" cpan module is not installed
  - ADVICE:
    - See :help |provider-perl| for more information.
    - You may disable this provider (and warning) by adding `let g:loaded_perl_provider = 0` to your init.vim

==============================================================================
telescope: require("telescope.health").check()

Checking for required plugins ~
- OK plenary installed.
- OK nvim-treesitter installed.

Checking external dependencies ~
- OK rg: found ripgrep 13.0.0
- OK fd: found fd 8.7.0

===== Installed extensions ===== ~

==============================================================================
vim.lsp: require("vim.lsp.health").check()

- LSP log level : WARN
- Log path: ~/.local/state/nvim/lsp.log
- Log size: 6 KB

vim.lsp: Active Clients ~
- copilot (id=1, root_dir=nil)

$ nvim --version
NVIM v0.9.1
Build type: Release
LuaJIT 2.1.0-beta3

   system vimrc file: "$VIM/sysinit.vim"
  fall-back for $VIM: "/usr/local/Cellar/neovim/0.9.1/share/nvim"

Run :checkhealth for more info

OS: macOS 13.4 22F66 x86_64

[spiderforrest]

@colonel-panic-at-the-disco I ran into the same issue, the cause is neovim being unable to create a temporary file, it's a system issue. On a linux box, you just set the environment
variable $XDG_RUNTIME_DIR to a folder your user owns, but mac doesn't follow the XDG specification...

You can check what directory it's trying to work in with :echo stdpath('run'), there's a lot more details * possible fixes on neovim issue 20865.

Good luck.