ERROR ReferenceError: process is not defined

[bavaleakashGL]

I always end up with this error
core.mjs:6485 ERROR ReferenceError: process is not defined
I am using Angular 13

[chihab]

Did you run the command ng add @ngx-env/builder?
Could you copy/paste your angular.json here?

[chihab]

Closing it.
Feel free to re-open the issue if you encounter it again.

[bavaleakashGL]

This is how I resolved it:
By default Angular does not allow process variable, you will need to add

import * as process from 'process';
window['process'] = process;

in polyfills.ts in order to enable it, after this it was a piece of cake. Thanks.