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

I found same problem and I solved it by using "rxjs": "5.4.1", "typescript": "~2.4.0" and adding "noStrictGenericChecks": true into tsconfig.json.