Auto popup not working with LanguageClient-neovim

Using ncm2 I can’t find a way to show completions from LSP without having to hit CTRL_X CTRL_O

OS

minimal vimrc:

    set nocompatible            " Must be first line
    filetype plugin indent on   " Automatically detect file types.
    syntax on                   " Syntax highlighting
    set autoread                " Autoread file if it was changed on disk
    set mouse=a                 " Automatically enable mouse usage
    set mousehide               " Hide the mouse cursor while typing
    scriptencoding utf-8
    set encoding=utf8
    if has('clipboard')
        if has('unnamedplus')  " When possible use + register for copy-paste
            set clipboard=unnamed,unnamedplus
        else         " On mac and Windows, use * register for copy-paste
            set clipboard=unnamed
        endif
    endif
    set autowrite                       " Automatically write a file when leaving a modified buffer
    set shortmess+=filmnrxcoOtT         " Abbrev. of messages (avoids 'hit enter')
    set viewoptions=folds,options,cursor,unix,slash " Better Unix / Windows compatibility
    set virtualedit=onemore             " Allow for cursor beyond last character
    set history=250                     " Store a ton of history (default is 20)
    set hidden                          " Allow buffer switching without saving
    set lazyredraw                      " Don't redraw on macros
    set iskeyword -=.                    " '.' is an end of word designator
    set iskeyword -=#                    " '#' is an end of word designator
    set iskeyword -=-                    " '-' is an end of word designator

    " Set completeopt to menuone only to disable the preview =_=
    "set completeopt=noinsert,menuone,preview,noselect
    au User Ncm2PopupOpen set completeopt=noinsert,menuone,noselect
    au User Ncm2PopupClose set completeopt=menuone


      call plug#begin('~/.vim/plugged')
      Plug 'autozimu/LanguageClient-neovim', { 'branch': 'next', 'do': 'bash install.sh' }
      Plug 'ncm2/ncm2'
      Plug 'roxma/nvim-yarp'
      call plug#end()

      let g:LanguageClient_serverCommands = {
            \ 'python': ['pyls'],
            \ 'rust': ['rls'],
            \ }

      autocmd BufEnter * call ncm2#enable_for_buffer()
      imap <expr> <CR>  (pumvisible() ?  "\<c-y>\<Plug>(expand_or_nl)" : "\<CR>")
      imap <expr> <Plug>(expand_or_nl) (cm#completed_is_snippet() ? "\<C-j>":"\<CR>")
      inoremap <expr> <Tab> pumvisible() ? "\<C-n>" : "\<Tab>"
      inoremap <expr> <S-Tab> pumvisible() ? "\<C-p>" : "\<S-Tab>"

neovim :version output

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"

neovim :messages output when the error occurs

N/A

[roxma]

Please test this PR https://github.com/autozimu/LanguageClient-neovim/pull/555

[roxma]

@jmdaly

This issue has been fixed

Please open new issue with detailed information.