No errors
run nvim
clipboard: provider is not available
please post log below, if you want me reproduce your issue quickly, post your custom config here will be better.

If you have any screenshots for this issue please upload here. BTW you can use https://asciinema.org/ for recording video in terminal.
you need compile vimproc. please read the doc of vimproc
I'm read it.
This :call dein#add('Shougo/vimproc.vim', {'build' : 'make'}) don't work. Nothing happens
I think your compiler configuration is broken.
You should execute make in vimproc directory.
I have read the same problem in SpaceVim gitter room.
src/proc.c:10:19: fatal error: stdio.h: No such file or directory
let me find article on setup for building from source... brb...
oh
ok, seems to have worked!
thanks Shougo!
Installing all build from source packages g++ etc, will take a while. Thanks for helping.
Note: He also uses Mint.
I installed build-essential before SpaceVim and problem were gone
Same issue again on OSX 10.15 Catalina. I think it is because this problem: https://stackoverflow.com/questions/58278260/cant-compile-a-c-program-on-a-mac-after-upgrading-to-catalina-10-15
happens
I do have this problem also, running make makes nothing happen!
Please execute make command on the directory manually.
Same issue on ubuntu WSL instaling neovim,
just go directory :~/.SpaceVim/bundle/vimproc.vim/ and type make to create it.
References:
https://github.com/Shougo/vimproc.vim
@scaamanho Thanks for your tips.
Thanks for the valuable tip @scaamanho!
Most helpful comment
Same issue on ubuntu WSL instaling neovim,
just go directory :~/.SpaceVim/bundle/vimproc.vim/ and type
maketo create it.References:
https://github.com/Shougo/vimproc.vim