angular2-app npm start

[joshSummerhays]

when i run npm start in the angular2-app:

$ npm start

> [email protected] start /Users/joshsummerhays/code/playground/File-upload-Angular2-Nodejs/angular2-app
> tsc && concurrently "npm run tsc:w" "npm run lite"

node_modules/rxjs/Subject.d.ts(16,22): error TS2415: Class 'Subject<T>' incorrectly extends base class 'Observable<T>'.
  Types of property 'lift' are incompatible.
    Type '<T, R>(operator: Operator<T, R>) => Observable<T>' is not assignable to type '<R>(operator: Operator<T, R>) => Observable<R>'.
      Type 'Observable<T>' is not assignable to type 'Observable<R>'.
        Type 'T' is not assignable to type 'R'.

npm ERR! Darwin 17.2.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "start"
npm ERR! node v6.11.4
npm ERR! npm  v3.10.10
npm ERR! code ELIFECYCLE
npm ERR! [email protected] start: `tsc && concurrently "npm run tsc:w" "npm run lite" `
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the [email protected] start script 'tsc && concurrently "npm run tsc:w" "npm run lite" '.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the angular2-start package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     tsc && concurrently "npm run tsc:w" "npm run lite"
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs angular2-start
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls angular2-start
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /Users/joshsummerhays/code/playground/File-upload-Angular2-Nodejs/angular2-app/npm-debug.log