[SpaceVim] [12:57:19][Warn] Failed to enable lsp for kotlin, ~ is not executable!
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## Expected behavior, english is required

## The reproduce ways from Vim starting (Required!)
All I did was add to my toml
```[[layers]]                                                                          
  name = "lang#kotlin"                                                              
  [[layers]]                                                                          
  name = "lsp"                                                                    
  filetypes = [                                                                     
 "kotlin",                                                                       
  "c",                                                                            
  "cpp",                                                                          
  "python",                                                                      
   "javascript",                                                                 
                                                                                 
  [layers.override_cmd]                                                         
  kotlin = "~/kotlin-language-server"                                             
```

To be honest I add the KLS to my PATH but I wasn't sure what specific folder to point to but pointed to the same where I'm overriding above but without the override spacevim doesn't see the server so I get   [SpaceVim] [Warn] Failed  to find the lsp sever command for kotlin. With the override I don't get that error I just the error in the title.                 


## Output of the `:SPDebugInfo!`
``` ### SpaceVim Health checking : 
   
  SpaceVim clipboard support check report: 
  Checking +clipboard: 
   SUCCEED! 
 SpaceVim environment check report:
 Current progpath: nvim(/usr/bin/nvim) 
 version: 800 
 OS: linux 
 [shell, shellcmdflag, shellslash]: ['/bin/bash', '-c', 0] 
 SpaceVim lua support check report: 
 Checking +lua: 
  Failed : Known issue, neovim do not support lua now. 
 SpaceVim python support check report: 
 Checking +python3: 
 Failed : to support +python3, you need run `pip3 install neovim` 
 Checking +python: 
 Failed : to support +python, you need run `pip2 install neovim` 
  
 ### SpaceVim runtime log : 
  
 ```log 
[ SpaceVim ] : logger file  does not exists, only log for current process will be shown! 
 [ SpaceVim ] [13:10:24] [ Info ] Startup with argv: ['groundzero/python/gz.py'] 
 [ SpaceVim ] [13:10:24] [ Info ] find local conf: /home/black/.SpaceVim.d/init.toml 
 [ SpaceVim ] [13:10:24] [ Info ] loading cached local conf: /home/black/.cache/SpaceVim/conf/_home_black__SpaceVim_
 [ SpaceVim ] [13:10:24] [ Info ] start to apply config [local] 
 [ SpaceVim ] [13:10:24] [ Warn ] Failed to enable lsp for kotlin, ~ is not executable! 
 [ SpaceVim ] [13:10:25] [ Info ] the func has been added to mode:syntax-checking 
 [ SpaceVim ] [13:10:25] [ Info ] the func has been added to mode:spell-checking 
 [ SpaceVim ] [13:10:25] [ Info ] the func has been added to mode:paste-mode 
 [   rooter ] [13:10:25] [ Info ] Load projects cache from: /home/black/.cache/SpaceVim/projects.json 
 [   rooter ] [13:10:28] [ Info ] Start to find root for: /home/black/ 
 [   rooter ] [13:10:28] [ Info ] buffer name: No Name 
 [   rooter ] [13:10:28] [ Info ] same as current directory, no need to change. 
 [   rooter ] [13:17:52] [ Info ] Start to find root for: /home/black/groundzero/python/gz.py 
 [   rooter ] [13:17:52] [ Info ]         (.git/):/home/black/groundzero/ 
 [   rooter ] [13:17:52] [ Info ] buffer name: groundzero/python/gz.py 
 [   rooter ] [13:17:52] [ Info ] change to root: /home/black/groundzero/ 
 ``` 
