We may face this problem when we run npm command in a Laravel project, which is cross-env: command not found npm.
The problem is creating by cross-env package. So to make cross-env working globally instead of having it in the project.
1) delete node_modules folder
2) run the below command
npm install
3) remove "cross-env": "^5.0.1", from package.json file
devDependencies section. Actually, you can skip this step and keep package.json intact. If you prefer.
4) run the below command
npm install –no-bin-links
5) run the below command
npm run dev
and see it working
N.B. Tested on Windows 10 with Laravel-5.4 and mac os bigsur with laravel 8.0
N.B.Windows 10 with Laravel-5.6 does not have this problem, thus updating is an alternative solution.