NeoVim can't start server

[Ja-rek]

The problem:

Error detected while processing function OmniSharp#TypeLookupWithoutDocumentation[1]..OmniSharp#TypeLookup:                                            
line   12:
E121: Undefined variable: type
Press ENTER or type command to continue
Error detected while processing function OmniSharp#TypeLookupWithoutDocumentation[1]..OmniSharp#TypeLookup:
line   12:                                                                                                 
E116: Invalid arguments for function OmniSharp#Echo
Press ENTER or type command to continue  

Configuration:

 ~/.omnisharp/omnisharp-roslyn  

 ./run -s /home/jk/CSharpProjects/CSharpProjects.sln

info: OmniSharp.Http.Startup[0]
      Starting OmniSharp on arch 0.0 (x64)
info: OmniSharp.Cake.CakeProjectSystem[0]
      Detecting Cake files in '/home/jk/CSharpProjects'.
info: OmniSharp.Cake.CakeProjectSystem[0]
      Could not find any Cake files
info: OmniSharp.Http.Startup[0]
      Project system 'OmniSharp.DotNet.DotNetProjectSystem' is disabled in the configuration.
info: OmniSharp.MSBuild.ProjectSystem[0]
      Detecting projects in '/home/jk/CSharpProjects/CSharpProjects.sln'.
info: OmniSharp.MSBuild.ProjectManager[0]
      Queue project update for '/home/jk/CSharpProjects/App/App.csproj'
info: OmniSharp.Script.ScriptProjectSystem[0]
      Detecting CSX files in '/home/jk/CSharpProjects'.
info: OmniSharp.Script.ScriptProjectSystem[0]
      Could not find any CSX files
info: OmniSharp.Http.Startup[0]
      Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpWorkspaceOptionsProvider
info: OmniSharp.Http.Startup[0]
      Configuration finished.
info: OmniSharp.Http.Startup[0]
      Omnisharp server running on port '2000' at location '/home/jk/CSharpProjects' on host -1.
info: OmniSharp.MSBuild.ProjectManager[0]
      Loading project: /home/jk/CSharpProjects/App/App.csproj
info: OmniSharp.MSBuild.ProjectManager[0]
      Successfully loaded project file '/home/jk/CSharpProjects/App/App.csproj'.
info: OmniSharp.MSBuild.ProjectManager[0]
      Adding project '/home/jk/CSharpProjects/App/App.csproj'
info: OmniSharp.MSBuild.ProjectManager[0]
      Update project: App

pacman -Ss libuv
extra/libuv 1.23.1-1 [installed]
    Multi-platform support library with a focus on asynchronous I/O

pacman -Ss mono | grep installed
extra/mono 5.14.0.177-1 [installed]
extra/mono-tools 4.2-1 [installed]

msbuild -v                                                                                                     
Microsoft (R) Build Engine version 15.1.8.0 ( Wed Sep  5 19:29:56 UTC 2018) for Mono

echo has('python3') || has('python')
returned 1

nvim -v        
NVIM v0.3.1
Build type: Release
LuaJIT 2.0.5
Compilation: /usr/bin/cc -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong -fno-plt -Wconversion -O2 -DNDEBUG -DMIN_LOG_LEVEL=3 -Wall -Wextra -pedantic -Wno-unused-parameter -Wstrict-prototypes -std=gnu99 -Wimplicit-fallthrough -Wvla -fstack-protector-strong -fdiagnostics-color=auto -Wno-array-bounds -DINCLUDE_GENERATED_DECLARATIONS -D_GNU_SOURCE -DNVIM_MSGPACK_HAS_FLOAT32 -DNVIM_UNIBI_HAS_VAR_FROM -I/build/neovim/src/build/config -I/build/neovim/src/neovim-0.3.1/src -I/usr/include -I/build/neovim/src/build/src/nvim/auto -I/build/neovim/src/build/include
Compiled by builduser

Features: +acl +iconv +jemalloc +tui 
See ":help feature-compile"

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

Run :checkhealth for more info

Init.Vim Currently:

"Settings
"OmniSharp
filetype plugin on
let g:OmniSharp_timeout = 5

"let g:ale_linters = { 'cs': ['OmniSharp'] }
"set completeopt=longest,menuone
"let g:OmniSharp_want_snippet=1
" let g:OmniSharp_server_use_mono = 1
" let g:OmniSharp_server_path ='/home/jk/.omnisharp/omnisharp-roslyn/omnisharp/OmniSharp.exe'

I've got plugged only Omnisharp-vim.
I Tried reinstall few time Omnisharp with commend OmniSharp Install 'v1.32.1'

System: ArchLinux

What can be wrong?

[nickspoons]

Could you try adding this to your init.vim and post the output after starting:

let g:OmniSharp_proc_debug = 1

[Ja-rek]

Thx you for the clue, I wasn't aware of problem with python package.

This resolved the problem.

pip uninstall nvim
pip install nvim