I have problem when I make watch for the file

and the error that shows up =>

```
Error: .//index.pug:2:1
    1| doctype html
  > 2|    html
-------^
    3|
    4|      head
    5|

unexpected token "indent"
    at makeError (C:\Users\amb\AppData\Roaming\npm\node_modules\pug-cli\node_modules\pug-error\index.js:32:13)
    at Parser.error (C:\Users\amb\AppData\Roaming\npm\node_modules\pug-cli\node_modules\pug-parser\index.js:53:15)
    at Parser.parseExpr (C:\Users\amb\AppData\Roaming\npm\node_modules\pug-cli\node_modules\pug-parser\index.js:264:14)
    at Parser.parse (C:\Users\amb\AppData\Roaming\npm\node_modules\pug-cli\node_modules\pug-parser\index.js:112:25)
    at parse (C:\Users\amb\AppData\Roaming\npm\node_modules\pug-cli\node_modules\pug-parser\index.js:12:20)
    at Object.parse (C:\Users\amb\AppData\Roaming\npm\node_modules\pug-cli\node_modules\pug\lib\index.js:126:22)
    at Function.loadString [as string] (C:\Users\amb\AppData\Roaming\npm\node_modules\pug-cli\node_modules\pug-load\index.js:45:21)
    at compileBody (C:\Users\amb\AppData\Roaming\npm\node_modules\pug-cli\node_modules\pug\lib\index.js:86:18)
    at Object.exports.compile (C:\Users\amb\AppData\Roaming\npm\node_modules\pug-cli\node_modules\pug\lib\index.js:242:16)
    at handleTemplateCache (C:\Users\amb\AppData\Roaming\npm\node_modules\pug-cli\node_modules\pug\lib\index.js:215:25)

```

any help please?