error on npm start

[nuander]

This returns an error. Am I on the right track here? Is this an error with angular-quickstart like it says below?

node_modules/rxjs/Subject.d.ts(16,22): error TS2415: Class 'Subject' incorrectly extends base class 'Observable'.
Types of property 'lift' are incompatible.
Type '(operator: Operator<T, R>) => Observable' is not assignable to type '(operator: Operator<T, R>) => Observable'.
Type 'Observable' is not assignable to type 'Observable'.
Type 'T' is not assignable to type 'R'.
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! angular-quickstart@1.0.0 start: tsc && concurrently "tsc -w" "lite-server"
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the angular-quickstart@1.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional log
ging output above.

Thanks

[nuander]

Please disregard