install lua failed on arch linux

[isvicy]

issue

command

:LspInstall lua

the terminal says:

    3 curl: no URL specified!                                                                                                                                                 
    2 curl: try 'curl --help' for more information                                                                                                                            
    1                                                                                                                                                                         
  4   [Process exited 2]   

:messages

...ite/pack/packer/start/nvim-lspinstall/lua/lspinstall.lua:20: [nvim-lspinstall] Could not install language server for lua

nvim version

NVIM v0.5.0
Build type: Release
LuaJIT 2.0.5
Compilation: /usr/bin/cc -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1 -DNVIM_TS_HAS_SET_MATCH_LIMIT -O2 -DNDEBUG -Wall -Wextra -pedantic -Wno-unused-parameter -Wstrict-prototypes -std=gnu99 -Wshadow -Wconversion -Wmissing-prototypes -Wimplicit-fallthrough -Wvla -fstack-protector-strong -fno-common -fdiagnostics-color=always -DINCLUDE_GENERATED_DECLARATIONS -D_GNU_SOURCE -DNVIM_MSGPACK_HAS_FLOAT32 -DNVIM_UNIBI_HAS_VAR_FROM -DMIN_LOG_LEVEL=3 -I/build/neovim/src/neovim-0.5.0/build/config -I/build/neovim/src/neovim-0.5.0/src -I/usr/include -I/build/neovim/src/neovim-0.5.0/build/src/nvim/auto -I/build/neovim/src/neovim-0.5.0/build/include
Compiled by builduser

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

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

Run :checkhealth for more info

lspinstall config

totally same as the demo config in README

local function setup_servers()
  require'lspinstall'.setup()
  local servers = require'lspinstall'.installed_servers()
  for _, server in pairs(servers) do
    require'lspconfig'[server].setup{}
  end
end

setup_servers()

-- Automatically reload after `:LspInstall <server>` so we don't have to restart neovim
require'lspinstall'.post_install_hook = function ()
  setup_servers() -- reload installed servers
  vim.cmd("bufdo e") -- this triggers the FileType autocmd that starts the server
end

curl version

curl 7.78.0 (x86_64-pc-linux-gnu) libcurl/7.78.0 OpenSSL/1.1.1l zlib/1.2.11 zstd/1.5.0 libidn2/2.3.2 libpsl/0.21.1 (+libidn2/2.3.0) libssh2/1.9.0 nghttp2/1.44.0
Release-Date: 2021-07-21
Protocols: dict file ftp ftps gopher gophers http https imap imaps mqtt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp 
Features: alt-svc AsynchDNS GSS-API HSTS HTTP2 HTTPS-proxy IDN IPv6 Kerberos Largefile libz NTLM NTLM_WB PSL SPNEGO SSL TLS-SRP UnixSockets zstd

[ak2kay]

after removing all content in stdpath("data"), in my case ~/.local/share/nvim, and a fresh PackerSync, problem solved.
guess it could be caused by remaining data of last installed lspinstall.