rxjs-chat error

ERROR in ./~/extract-text-webpack-plugin/loader.js?{"omit":1,"extract":true,"remove":true}!./~/style-loader!./~/css-loader?sourceMap!./~/sass-loader?outputStyle=expanded&root=/Users/xxxx/Projects/ng-book2-code/rxjs/chat/app&&includePaths[]/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules&&includePaths[]/Users/xxxx/Projects/ng-book2-code/rxjs/chat/app!./app/css/styles.scss
Module build failed: Error: /Users/xxxx/.npm-packages/lib/node_modules/typescript/lib/lib.d.ts:1168:23
Cannot find name 'arg'.
    at emitError (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/awesome-typescript-loader/dist/index.js:262:45)
    at Array.forEach (native)
    at Compiler.<anonymous> (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/awesome-typescript-loader/dist/index.js:265:24)
    at Compiler.next (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/node_modules/tapable/lib/Tapable.js:69:14)
    at Compiler.<anonymous> (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/lib/CachePlugin.js:40:4)
    at Compiler.applyPluginsAsync (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/node_modules/tapable/lib/Tapable.js:71:13)
    at Compiler.<anonymous> (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/lib/Compiler.js:400:9)
    at Compilation.<anonymous> (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/lib/Compilation.js:577:13)
    at Compilation.applyPluginsAsync (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/node_modules/tapable/lib/Tapable.js:60:69)
    at Compilation.<anonymous> (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/lib/Compilation.js:572:10)
    at Compilation.applyPluginsAsync (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/node_modules/tapable/lib/Tapable.js:60:69)
    at Compilation.<anonymous> (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/lib/Compilation.js:567:9)
    at Compilation.applyPluginsAsync (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/node_modules/tapable/lib/Tapable.js:60:69)
    at Compilation.<anonymous> (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/lib/Compilation.js:563:8)
    at Compilation.applyPluginsAsync (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/node_modules/tapable/lib/Tapable.js:60:69)
    at Compilation.seal (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/lib/Compilation.js:525:7)
    at Compiler.<anonymous> (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/lib/Compiler.js:397:15)
    at /Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/node_modules/tapable/lib/Tapable.js:103:11
    at Compilation.<anonymous> (/Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/lib/Compilation.js:445:10)
    at /Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/lib/Compilation.js:417:12
    at /Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/lib/Compilation.js:332:10
    at /Users/xxxx/Projects/ng-book2-code/rxjs/chat/node_modules/webpack/node_modules/async/lib/async.js:52:16

ERROR in /Users/xxxx/.npm-packages/lib/node_modules/typescript/lib/lib.d.ts:1168:23
Cannot find name 'arg'.

ERROR in /Users/xxxx/.npm-packages/lib/node_modules/typescript/lib/lib.d.ts:1168:27
';' expected.

ERROR in /Users/xxxx/.npm-packages/lib/node_modules/typescript/lib/lib.d.ts:1168:27
Cannot find name 'is'.

ERROR in /Users/xxxx/.npm-packages/lib/node_modules/typescript/lib/lib.d.ts:1168:30
';' expected.

ERROR in /Users/xxxx/.npm-packages/lib/node_modules/typescript/lib/lib.d.ts:1168:40
'(' expected.

ERROR in /Users/xxxx/.npm-packages/lib/node_modules/typescript/lib/lib.d.ts:1169:25
'(' expected.

ERROR in /Users/xxxx/.npm-packages/lib/node_modules/typescript/lib/lib.d.ts:1170:0
Declaration or statement expected.