AngularFireAuth.auth.signInAnonymous不返回承诺？

Question

我的授权服务中具有以下匿名登录方法：

anonymousLogin() {
    console.log("anonymousLogin entered");
    return this.afAuth.auth.signInAnonymously()
     .then((credential) => {
       console.log("success inside callback for signInAnonymously");
       // this.authState = credential;
       this.updateUserData(credential.user);
     })
     .catch(error => console.log(error));
  }

我可以确认在控制台中打印了console.log("anonymousLogin entered");行，但是在控制台中没有console.log("success inside callback for signInAnonymously"); nor 打印了console.log(error));行。我不确定我的登录尝试在哪里丢失了，也不确定如何从此处进行故障排除。我欢迎任何建议。

版本信息

我的package.json内容：

{
  "name": "population-fragmentation",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^6.1.10",
    "@angular/cdk": "^6.4.7",
    "@angular/common": "^6.1.10",
    "@angular/compiler": "^6.1.10",
    "@angular/core": "^6.1.10",
    "@angular/fire": "^5.2.3",
    "@angular/forms": "^6.1.10",
    "@angular/material": "^6.4.7",
    "@angular/platform-browser": "^6.1.10",
    "@angular/platform-browser-dynamic": "^6.1.10",
    "@angular/router": "^6.1.10",
    "aws-sdk": "^2.585.0",
    "compass-mixins": "^0.12.10",
    "core-js": "^2.6.9",
    "firebase": "^7.5.0",
    "firebase-functions-test": "^0.1.7",
    "hammerjs": "^2.0.8",
    "material-design-icons": "^3.0.1",
    "pet-names": "^1.0.1",
    "rxjs": "^6.3.3",
    "sass": "^1.23.7",
    "stripe": "^7.14.0",
    "zone.js": "^0.8.29"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "^0.6.8",
    "@angular/cli": "~6.0.8",
    "@angular/compiler-cli": "^6.1.10",
    "@angular/language-service": "^6.1.10",
    "@types/jasmine": "^2.8.16",
    "@types/jasminewd2": "^2.0.6",
    "@types/node": "^8.10.49",
    "@types/stripe": "^7.13.12",
    "@types/stripe-checkout": "^1.0.3",
    "@types/stripe-v3": "^3.1.9",
    "codelyzer": "~4.2.1",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~1.7.1",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "^2.1.1",
    "karma-jasmine": "~1.1.1",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "^5.4.2",
    "ts-node": "~5.0.1",
    "tslint": "~5.9.1",
    "typescript": "2.8.1"
  }
}

**截图**

（我已经在我的Firebase项目中启用了匿名登录）