Problem while compiling at start

[dlusignan]

**When I start my application: npm start

I get this compiling error:**

[at-loader] Checking finished with 2 errors
[at-loader] ./node_modules/ngx-bootstrap-growl/node_modules/rxjs/Subject.d.ts:16:22
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'.

[at-loader] ./node_modules/ngx-bootstrap-growl/node_modules/rxjs/observable/dom/WebSocketSubject.d.ts:23:22
TS2415: Class 'WebSocketSubject' incorrectly extends base class 'AnonymousSubject'.
Types of property 'lift' are incompatible.
Type '(operator: Operator<T, R>) => WebSocketSubject' is not assignable to type '(operator: Operator<T, R>) => Observable'.
Type 'WebSocketSubject' is not assignable to type 'Observable'.
Types of property 'operator' are incompatible.
Type 'Operator<any, R>' is not assignable to type 'Operator<any, T>'.
Type 'R' is not assignable to type 'T'.

[AlanObject]

I am getting the same error. My version information is:

Angular CLI: 1.6.1
Node: 8.2.0
OS: darwin x64
Angular: 5.1.1
... animations, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router

@angular/cli: 1.6.1
@angular-devkit/build-optimizer: 0.0.36
@angular-devkit/core: 0.0.22
@angular-devkit/schematics: 0.0.42
@ngtools/json-schema: 1.1.0
@ngtools/webpack: 1.9.1
@schematics/angular: 0.1.11
@schematics/schematics: 0.0.11
typescript: 2.4.2
webpack: 3.10.0

And my error stack is:

ERROR in node_modules/ng2-bootstrap-growl/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 '<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'.
node_modules/ng2-bootstrap-growl/node_modules/rxjs/observable/dom/WebSocketSubject.d.ts(23,22): error TS2415: Class 'WebSocketSubject<T>' incorrectly extends base class 'AnonymousSubject<T>'.
  Types of property 'lift' are incompatible.
    Type '<R>(operator: Operator<T, R>) => WebSocketSubject<R>' is not assignable to type '<R>(operator: Operator<T, R>) => Observable<T>'.
      Type 'WebSocketSubject<R>' is not assignable to type 'Observable<T>'.
        Types of property 'operator' are incompatible.
          Type 'Operator<any, R>' is not assignable to type 'Operator<any, T>'.

```            Type 'R' is not assignable to type 'T'.

[criogeniacuta]

Same error too.

My version:

Angular CLI: 1.7.4
Node: 8.12.0
OS: win32 x64
Angular: 5.2.11
... animations, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router

@angular/cli: 1.7.4
@angular-devkit/build-optimizer: 0.3.2
@angular-devkit/core: 0.3.2
@angular-devkit/schematics: 0.3.2
@ngtools/json-schema: 1.2.0
@ngtools/webpack: 1.10.2
@schematics/angular: 0.3.2
@schematics/package-update: 0.3.2
typescript: 2.5.3
webpack: 3.11.0

Error stack:

ERROR in node_modules/ngx-bootstrap-growl/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 '<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'.
node_modules/ngx-bootstrap-growl/node_modules/rxjs/observable/dom/WebSocketSubject.d.ts(23,22): error TS2415: Class 'WebSocketSubject<T>' incorrectly extends base class 'AnonymousSubject<T>'.
Types of property 'lift' are incompatible.
Type '<R>(operator: Operator<T, R>) => WebSocketSubject<R>' is not assignable to type '<R> operator: Operator<T, R>) => Observable<T>'.
Type 'WebSocketSubject<R>' is not assignable to type 'Observable<T>'.
Types of property 'operator' are incompatible.
Type 'Operator<any, R>' is not assignable to type 'Operator<any, T>'.
Type 'R' is not assignable to type 'T'.