Angular 类构造函数NgbDatepickerI18n在没有'；新'；

在从Angular 5更新到Angular 8之后，我在使用@ng bootstrap/ng bootstrap包中的日期选择器打开一个模式窗口时遇到了这个错误。尝试创建两个提供程序对象之一（NgbDatepickerI18n和NgbDateParserFormatter）时引发错误。除此之外，整个应用程序构建和运行良好

@Component({
    selector: 'jhi-datepicker-termin',
    templateUrl: './datepicker-termin.component.html',
    styleUrls: ['./../datepicker.style.scss', './datepicker-termin.style.scss'],
    providers: [NgbDatepickerConfig,
        {provide: NgbDatepickerI18n, useClass: DatepickerI18n},
        {provide: NgbDateParserFormatter, useClass: NgbDatepickerParserFormatter}
        ],
})
export class DatepickerTerminComponent {

package.json：

"dependencies": {
    "@angular/common": "8.2.14",
    "@angular/compiler": "8.2.14",
    "@angular/core": "8.2.14",
    "@angular/forms": "8.2.14",
    "@angular/platform-browser": "8.2.14",
    "@angular/platform-browser-dynamic": "8.2.14",
    "@angular/router": "8.2.14",
    "@ng-bootstrap/ng-bootstrap": "5.1.5",
...
"devDependencies": {
    "@angular-devkit/build-angular": "0.803.22",
    "@angular/cli": "8.3.22",
    "@angular/compiler-cli": "8.2.14",
    "@ngtools/webpack": "8.3.21",
...
"engines": {
    "node": "12.14.0"
...

tsconfig.json：

{
    "compilerOptions": {
        "target": "es5",
        "module": "es2015",
        "moduleResolution": "node",
        "sourceMap": true,
        "emitDecoratorMetadata": true,
        "experimentalDecorators": true,
        "removeComments": false,
        "noImplicitAny": false,
        "skipLibCheck": true,
        "suppressImplicitAnyIndexErrors": true,
        "outDir": "target/www/app",
        "lib": [
            "es2018",
            "dom"
        ],
        "typeRoots": [
            "node_modules/@types"
        ],
        "baseUrl": "./",
        "paths": {
            "@angular/*": [
                "../node_modules/@angular/*"
            ]
        }
    },
    "include": [
        "src/main/webapp/app",
        "src/test/javascript/"
    ]
}

将target/lib切换到es6/es2015没有帮助。 使用jhipster为浏览器兼容推荐的最新版本的core.js。巴别塔没有使用。

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很少有“不相关”的软件包过时了。这会导致问题吗？许多thx需要帮助或任何提示。

运气好吗？我现在面临着同样的问题。运气好吗？我现在面临着同样的问题。