rxjs/Subject.d.ts error : Class 'Subject' incorrectly extends base class 'Observable'

Question

I extracted sample template code from this tutorial and did below two steps to get started -

1. npm install // worked fine and created node_modules folder

Answer 1

Keep the noStrictGeneric option true in tsconfig.config file

{
    "compilerOptions": {
        "noStrictGenericChecks": true
    }
}