Failed to deploy expressjs to heroku - node.js

Question

so im trying to deploy my expressjs server , i've already done the login between heroku and github but after i execute the command git push heroku master i get this type of error
-----> Building on the Heroku-20 stack
-----> Determining which buildpack to use for this app
-----> Node.js app detected
-----> Creating runtime environment
NPM_CONFIG_LOGLEVEL=error
NODE_VERBOSE=false
NODE_ENV=production
NODE_MODULES_CACHE=true
-----> Installing binaries
engines.node (package.json): unspecified
engines.npm (package.json): unspecified (use default)
Resolving node version 14.x...
Downloading and installing node 14.17.3...
Using default npm version: 6.14.13
-----> Installing dependencies
Prebuild detected (node_modules already exists)
Rebuilding any native modules
> bcrypt#5.0.1 install /tmp/build_e68eccdb/node_modules/bcrypt
> node-pre-gyp install --fallback-to-build
sh: 1: node-pre-gyp: Permission denied
npm ERR! code ELIFECYCLE
npm ERR! errno 126
npm ERR! bcrypt#5.0.1 install: `node-pre-gyp install --fallback-to-build`
npm ERR! Exit status 126
npm ERR!
npm ERR! Failed at the bcrypt#5.0.1 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! /tmp/npmcache.F7UGs/_logs/2021-07-17T18_32_02_636Z-debug.log
-----> Build failed
We're sorry this build is failing! You can troubleshoot common issues here:
https://devcenter.heroku.com/articles/troubleshooting-node-deploys
Some possible problems:
- node_modules checked into source control
https://devcenter.heroku.com/articles/node-best-practices#only-git-the-important-bits
- Node version not specified in package.json
https://devcenter.heroku.com/articles/nodejs-support#specifying-a-node-js-version
Love,
Heroku
! Push rejected, failed to compile Node.js app.
! Push failed
this is package.json
{
"name": "Server",
"version": "1.0.0",
"description": "",
"main": "Server.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"start": "nodemon server.js"
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
"bcrypt": "^5.0.1",
"body-parser": "^1.19.0",
"express": "^4.17.1",
"jsonwebtoken": "^8.5.1",
"mongoose": "^5.12.4",
"nexmo": "^2.9.1",
"nodemailer": "^6.6.0",
"textbelt": "0.0.4",
"twilio": "^3.61.0"
}
}
i tried deleting node_modules and package-lock.json and reinstall them again but it doesnt work
is there any solution for this ?
Thanks !