Angular：成功的Web请求后不会调用订阅

如何解决Angular：成功的Web请求后不会调用订阅

我有一个带有 graphql 的 angular ionic 应用程序。我从 angular 8 更新到 9 到 10 到 11。迁移成功，我的应用程序确实可以转换。

但是如果我尝试通过 apollo 执行以下请求，则不会调用 subsribe 方法，但 Web 请求返回 200。我可以在浏览器中看到它，并且可以看到我的应用程序服务器的日志。不知道为什么这段代码没有执行。

     this.apollo.mutate({
                mutation: gql`
                    mutation Test {
                        test
                    }
                `
            }).subscribe(({data}) => {
                console.log('got data',data);
            });

这些是我尝试调用突变的文件中的依赖项导入：

import {Component} from '@angular/core';

import {Platform} from '@ionic/angular';
import {SplashScreen} from '@ionic-native/splash-screen/ngx';
import {StatusBar} from '@ionic-native/status-bar/ngx';
import {UserService} from "./services/user.service";
import {TranslateService} from "@ngx-translate/core";
import {environment} from '../environments/environment';
import {ImageService} from './services/image.service';
import {NgEventBus} from 'ng-event-bus';
import {Events} from './events/events';
import {User} from './entities/user.entity';
import {Apollo,gql} from 'apollo-angular';

这是我在项目中的依赖项。我已经通过删除文件夹并运行 npm install 来检查我的 node_modules 是否仅包含这些依赖项。如果我创建一个新项目，一切都会按预期正常工作。

 "dependencies": {
    "@angular-devkit/architect": "^0.1102.3","@angular-devkit/core": "^11.2.3","@angular/common": "^11.2.5","@angular/core": "^11.2.5","@angular/forms": "^11.2.5","@angular/localize": "^11.2.5","@angular/platform-browser": "^11.2.5","@angular/platform-browser-dynamic": "^11.2.5","@angular/router": "^11.2.5","@apollo/client": "^3.3.11","@capacitor/core": "2.4.7","@ionic-native/core": "^5.31.1","@ionic-native/splash-screen": "^5.31.1","@ionic-native/status-bar": "^5.31.1","@ionic/angular": "^5.6.0","@ngx-translate/core": "^13.0.0","@ngx-translate/http-loader": "^6.0.0","apollo-angular": "^2.4.0","graphql": "^15.0.0","ng-event-bus": "^2.0.0","postcss": "^8.2.8","rxjs": "~6.6.6","tslib": "^2.0.0","zone.js": "~0.11.3"
  },"devDependencies": {
    "@angular-devkit/build-angular": "^0.1102.3","@angular/cli": "^11.2.4","@angular/compiler": "^11.2.5","@angular/compiler-cli": "^11.2.5","@angular/language-service": "^11.2.5","@capacitor/cli": "2.4.7","@graphql-codegen/typescript-apollo-angular": "^2.3.1","@ionic/angular-toolkit": "^3.1.0","@types/jasmine": "~3.6.6","@types/jasminewd2": "~2.0.8","@types/node": "^14.14.33","codelyzer": "^6.0.1","jasmine-core": "~3.6.0","jasmine-spec-reporter": "~6.0.0","karma": "~6.1.2","karma-chrome-launcher": "~3.1.0","karma-coverage-istanbul-reporter": "~3.0.3","karma-jasmine": "~4.0.1","karma-jasmine-html-reporter": "^1.5.4","protractor": "~7.0.0","ts-node": "~9.1.1","tslint": "~6.1.0","typescript": "~4.1.5"
  }

我错过了什么？