having a problem with setting up my babel-watch in node.js - npm

Question

I am trying to install babel watch after I have installed babel
my json file is as follows
{
"name": "t3",
"version": "1.0.0",
"description": "",
"main": "app.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"build": "babel server.js --out-dir build",
"dev-start": "babel-watch server.js"
},
"author": "",
"license": "ISC",
"dependencies": {
"express": "^4.17.1"
},
"devDependencies": {
"babel-cli": "^6.26.0",
"babel-preset-env": "^1.7.0",
"babel-watch": "^7.0.0"
}
}
but i am getting this error while running
npm run dev-start
t3#1.0.0 dev-start C:\Users\PRO\Desktop\t3
babel-watch server.js
internal/modules/cjs/loader.js:583
throw err;
^
Error: Cannot find module '#babel/core'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:581:15)
at Function.Module._load (internal/modules/cjs/loader.js:507:25)
at Module.require (internal/modules/cjs/loader.js:637:17)
at require (internal/modules/cjs/helpers.js:22:18)
at Object. (C:\Users\PRO\Desktop\t3\node_modules\babel-watch\babel-watch.js:7:15)
at Module._compile (internal/modules/cjs/loader.js:689:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
at Module.load (internal/modules/cjs/loader.js:599:32)
at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
at Function.Module._load (internal/modules/cjs/loader.js:530:3) npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! t3#1.0.0 dev-start:
babel-watch server.js npm ERR! Exit status 1 npm ERR! npm ERR!
Failed at the t3#1.0.0 dev-start script. npm ERR! This is probably not
a problem with npm. There is likely additional logging output above.

Answer 1

[Update]
You might have update the babel. check out https://github.com/babel/babel/issues/8908 & How to upgrade to babel 7
Try
npm install #babel/core --save