Project assembly. What is wrong with npm script?

Question

npm

I repeat after the lesson on the net.
He succeeded, I made some mistake.
I googled, but I didn’t find much in Russian, but I couldn’t figure it out in English, because I’m not so familiar with npm.
installed postcss
-cli autoprefixer
I don't see any syntax errors.
tried changing the task to :""prefix:css": "postcss --use autoprefixer --autoprefixer.browsers 'last 2 versions' css/style.concat.css -o css/style.prefix.css""
opened debug file:
0 info it worked if it ends with ok
1 verbose cli [ 'D:\\node.exe',
1 verbose cli 'D:\\node_modules\\npm\\bin\\npm-cli.js',
1 verbose cli 'run',
1 verbose cli 'prefix:css'
3 info using [email protected]
4 verbose run-script [ 'prefix:css' ]
5 info lifecycle [email protected]~prefix:css: [email protected]
6 verbose lifecycle [email protected]~prefix:css : unsafe-perm in lifecycle true
7 verbose lifecycle [email protected]~prefix:css: PATH: D:\node_modules\npm\node_modules\npm-lifecycle\node-gyp-bin;C:\Users\trans\Desktop\sublime\advanced_css\node_modules\. bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Skype\Phone\ ;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0 \;C:\WINDOWS\System32\OpenSSH\;D:\;C:\Users\trans\AppData\Local\Microsoft\WindowsApps;C:\Program Files\Microsoft VS Code\bin;C:\Users\trans\ AppData\Roaming\npm
8 verbose lifecycle [email protected]~prefix:css: CWD: C:\Users\trans\Desktop\sublime\advanced_css
9 silly lifecycle [email protected]~prefix:css: Args: [ '/ d/s/c',
9 silly lifecycle 'postcss --use autoprefixer -b \'last 10 versions\' css/style.concat.css -o css/style.prefix.css' ]
10 silly lifecycle [email protected]~prefix:css: Returned : code: 1 signal: null
11 info lifecycle [email protected]~prefix:css: Failed to exec prefix:css script
12 verbose stack Error: [email protected] prefix:css: `postcss --use autoprefixer -b ' last 10 versions' css/style.concat.css -o css/style.prefix.css`
12 verbose stack Exit status 1
12 verbose stack at EventEmitter. (D:\node_modules\npm\node_modules\npm-lifecycle\index.js:285:16)
12 verbose stack at emitTwo (events.js:126:13)
12 verbose stack at EventEmitter.emit (events.js:214: 7)
12 verbose stack at ChildProcess. (D:\node_modules\npm\node_modules\npm-lifecycle\lib\spawn.js:55:14)
12 verbose stack at emitTwo (events.js:126:13)
12 verbose stack at ChildProcess.emit (events.js: 214:7)
12 verbose stack at maybeClose (internal/child_process.js:925:16)
12 verbose stack at Process.ChildProcess._handle.onexit (internal/child_process.js:209:5)
13 verbose pkgid [email protected]
14 verbose cwd C:\Users\trans\Desktop\sublime\advanced_css
15 verbose Windows_NT 10.0.17134
16 verbose argv "D:\\node.exe" "D:\\node_modules\\npm\\bin\\npm-cli .js" "run" "prefix:css"
17 verbose node v8.11.4
18 verbose npm v5.6.
21 error [email protected] prefix:css: `postcss --use autoprefixer -b 'last 10 versions' css/style.concat.css -o css/style.prefix.css`
21 error Exit status 1
22 error Failed at the [email protected] prefix:css script.
22 error This is probably not a problem with npm. There is likely additional logging output above.
23 verbose exit [ 1, true ]
doesn't mean anything to me
And where should I look when similar problems arise in the future?
in the debay file, in theory, there should be a clue, right?
which of the lines can tell what is the cause of the error?
does anyone know what could be the problem? mistake? how to fix?

Answer 1

Try the following steps:
- First run: npm cache clean --force on the command line in the project directory
- Then remove the node_modules folder from the project
- Remove the package-lock.json file from the project
- After these steps run: npm install
Had the same error, these steps helped.

Answer 2

Try this: "prefix": "postcss css/style.concat.css -u autoprefixer -o css/style.prefix.css"