Erro 500 quando vou fazer o Upload da imagem

Metodo upload do photo.service

upload(description: string, allowComments: boolean, file: File) {
        const formData = new FormData();
        formData.append('description', description);
        formData.append('allowComments', allowComments ? 'true' : 'false');
        formData.append('file', file);
        return this.http.post(API + '/photos/upload', formData);
    }

Class PhotoComponent

export class PhotoComponent {
    private _url = '';
    @Input() description = '';
    @Input() set url(url: string) {
        if (!url.startsWith('data')) {
            this._url = cloud + url;
        } else {
            this._url = url;
        }
    }
    get url() {
        return this._url;
    }
}

Metodo upload do photo-form.component

  upload() {
    const description = this.photoForm.get('description').value;
    const allowComments = this.photoForm.get('allowComments').value;
    this.photoService.upload(description, allowComments, this.file)
    .subscribe(
      () => this.router.navigate(['']),
      err => console.log(err)
    );
  }

Erro lançado no console do browser

POST http://localhost:3000/photos/upload 500 (Internal Server Error)
photo-form.component.ts:36 HttpErrorResponse {headers: HttpHeaders, status: 500, statusText: "Internal Server Error", url: "http://localhost:3000/photos/upload", ok: false, …}error: {message: "Internal server error"}headers: HttpHeaderslazyInit: () => {…}lazyUpdate: nullnormalizedNames: Map(0) {}__proto__: Objectmessage: "Http failure response for http://localhost:3000/photos/upload: 500 Internal Server Error"name: "HttpErrorResponse"ok: falsestatus: 500statusText: "Internal Server Error"url: "http://localhost:3000/photos/upload"__proto__: HttpResponseBaseconstructor: class HttpErrorResponse__proto__: Object

Erro lançado no terminal do servidos node

Valid token received: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6MSwibmFtZSI6ImZsYXZpbyIsImVtYWlsIjoiZmxhdmlvQGFsdXJhcGljLmNvbS5iciIsImlhdCI6MTU2MzIxNzM4OSwiZXhwIjoxNTYzMzAzNzg5fQ.V8leJt-GBrd1jMN9beXZZWEaulHJdw9mNl0JBXBkagQ
Error: Unexpected field
    at makeError (C:\Users\mamaral\Documents\Cursos Alura\alurapic\api\node_modules\multer\lib\make-error.js:12:13)
    at wrappedFileFilter (C:\Users\mamaral\Documents\Cursos Alura\alurapic\api\node_modules\multer\index.js:40:19)
    at Busboy.<anonymous> (C:\Users\mamaral\Documents\Cursos Alura\alurapic\api\node_modules\multer\lib\make-middleware.js:114:7)
    at Busboy.emit (events.js:198:13)
    at Busboy.emit (C:\Users\mamaral\Documents\Cursos Alura\alurapic\api\node_modules\busboy\lib\main.js:38:33)
    at PartStream.<anonymous> (C:\Users\mamaral\Documents\Cursos Alura\alurapic\api\node_modules\busboy\lib\types\multipart.js:213:13)
    at PartStream.emit (events.js:198:13)
    at HeaderParser.<anonymous> (C:\Users\mamaral\Documents\Cursos Alura\alurapic\api\node_modules\dicer\lib\Dicer.js:51:16)
    at HeaderParser.emit (events.js:198:13)
    at HeaderParser._finish (C:\Users\mamaral\Documents\Cursos Alura\alurapic\api\node_modules\dicer\lib\HeaderParser.js:68:8)