svls not show svlint message

[leehc257]

hello,
i try to use this tool in neovim + coc.vim (by iterm2)

i installed svls and svlint

$ svls --version
svls 0.2.8
$ svlint --version
svlint 0.7.2

and i write coc-settings.json like this:

 "languageserver": {
   "svls": {
      "command": "svls",
      "filetypes": ["systemverilog"]
      }
     }

and i write ~/.svls.toml & ./svlint.toml like this :

$cat ~/.svls.toml
[verilog]
include_paths = ["./*"]
defines = ["DEBUG", "VAR=1"]

[option]
linter = true

$cat ~/.svlint.toml
[option]
exclude_paths = []

[rules]
case_default = true
enum_with_type = false
for_with_begin = true
function_same_as_system_function = true
function_with_automatic = true
generate_for_with_label = false
generate_if_with_label = false
generate_keyword_forbidden = true
generate_keyword_required = false
genvar_declaration_in_loop = false
genvar_declaration_out_loop = false
if_with_begin = true
inout_with_tri = false
input_with_var = false
interface_port_with_modport = false
legacy_always = false
level_sensitive_always = true
loop_variable_declaration = false
non_ansi_module = true
output_with_var = false
parameter_in_package = false
priority_keyword = false
tab_character = false
unique0_keyword = false
unique_keyword = false
wire_reg = false
generate_keyword = false
tab_charactor = false
genvar_declaration = false

when i edit a systemverilog file, it just show 'parse error (svls)'
i want to show svlint message

is there something i'm missing?
or
syntax error show only 'parse error(svls)'?