auto-completion not working

[Yousuf28]

Here is my coc-settings.json for R. For some reason auto-completion not working. I am running vim on Windows. Please help to solve.

"languageserver": {
    "R": {
        "enable": true,
        "command": "C:\\Program Files\\R\\R-4.1.2\\bin\\x64\\R.exe",
        "r.lsp.path": "C:\\Program Files\\R\\R-4.1.2\\bin\\x64\\R.exe",
        "r.lsp.debug": true,
        "args": [
            "--slave",
            "-e",
            "languageserver::run()"
        ],
        "filetypes": [
            "r"
        ]
    }
}

I got following error when I open R file in vim.