Project won't build (rxjs types.d.ts errors)

[ArturBaybulatov]

baybulatov-imac:angular-realworld-example-app arturbaybulatov$ npm start

> [email protected] start /Users/arturbaybulatov/Downloads/angular-realworld-example-app
> ng serve

** Angular Live Development Server is listening on localhost:4200, open your browser on http://localhost:4200/ **
                                                                                          
Date: 2019-03-19T09:24:58.177Z
Hash: 080ec5999b4f139b8a5c
Time: 1840ms
chunk {main} main.js, main.js.map (main) 1.98 kB [initial] [rendered]
chunk {polyfills} polyfills.js, polyfills.js.map (polyfills) 708 bytes [initial] [rendered]
chunk {runtime} runtime.js, runtime.js.map (runtime) 5.22 kB [entry] [rendered]
chunk {styles} styles.js, styles.js.map (styles) 15.6 kB [initial] [rendered]
chunk {vendor} vendor.js, vendor.js.map (vendor) 335 kB [initial] [rendered]

ERROR in node_modules/rxjs/internal/types.d.ts(81,44): error TS1005: ';' expected.
node_modules/rxjs/internal/types.d.ts(81,74): error TS1005: ';' expected.
node_modules/rxjs/internal/types.d.ts(81,77): error TS1109: Expression expected.

ℹ ｢wdm｣: Failed to compile.

[owenmecham]

@ArturBaybulatov did you make sure to execute yarn install prior to running the application? If so, have you tried deleting your node_modules folder and then running yarn install again before running npm run start

[ArturBaybulatov]

Sorry, I don't have yarn installed. Never used it actually.