npm install error - SKIPPING OPTIONAL DEPENDENCY - laravel

Question

I'm trying to follow an online course of laravel with laragon. I need to run the command npm install, but it marks an error and I don't know how to fix it.
I tried to modify the path but that did not work
C:\laragon\www\social>npm install
"CALL "C:\laragon\nodejs\\node.exe" "C:\laragon\nodejs\\node_modules\npm\bin\npm-cli.js" prefix -g" no se reconoce como un comando interno o externo,
programa o archivo por lotes ejecutable.
> node-sass#4.11.0 install C:\laragon\www\social\node_modules\node-sass
> node scripts/install.js
npm WARN ajv-keywords#3.2.0 requires a peer of ajv#^6.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN img-loader#3.0.1 requires a peer of imagemin#^5.0.0 || ^6.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents#1.2.7 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents#1.2.7: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm ERR! file C:\Windows\system32\cmd.exe;C:\Users\Caribay\Anaconda3\Library\bin\graphviz;C:\Users\Caribay\AppData\Roaming\npm
npm ERR! path C:\Windows\system32\cmd.exe;C:\Users\Caribay\Anaconda3\Library\bin\graphviz;C:\Users\Caribay\AppData\Roaming\npm
npm ERR! code ELIFECYCLE
npm ERR! errno ENOENT
npm ERR! syscall spawn C:\Windows\system32\cmd.exe;C:\Users\Caribay\Anaconda3\Library\bin\graphviz;C:\Users\Caribay\AppData\Roaming\npm
npm ERR! node-sass#4.11.0 install: `node scripts/install.js`
npm ERR! spawn C:\Windows\system32\cmd.exe;C:\Users\Caribay\Anaconda3\Library\bin\graphviz;C:\Users\Caribay\AppData\Roaming\npm ENOENT
npm ERR!
npm ERR! Failed at the node-sass#4.11.0 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\Caribay\AppData\Roaming\npm-cache\_logs\2019-01-22T03_32_49_327Z-debug.log
I hope with this command works correctly but it marks these errors, help me, please
P.S: I work on a laptop with windows 7 home premium.

Answer 1

$ npm cache clean --force
delete node_modules by $ rm -rf node_modules
$ npm install
And then start it again with $ npm start

Answer 2

I think you should install manually ajv package or update it to version 6.0 if you already have a lower version
npm i ajv
i had a similar issue. after updating it works fine. Try doing same for other errors also.